CN108307187B - Naked eye 3D display device and display method thereof - Google Patents

Abstract

The invention discloses naked eye 3D display equipment and a display method thereof, wherein a display screen of the naked eye 3D display equipment comprises a plurality of rows and a plurality of columns of pixels; the grating structure of the naked eye 3D display device comprises a plurality of grating units which are sequentially arranged, at least one grating unit is uniquely corresponding to every four adjacent rows of pixels, and the method comprises the following steps: acquiring the positions of eyes of an observer when the observer faces the display screen; judging whether the binocular positions fall into an optimal observation area of the naked eye 3D visual area, and if the binocular positions do not fall into the optimal observation area, adjusting the image display of the row pixels corresponding to each grating unit to adjust the space position of the optimal observation area. Through the switch control of each row of pixels, the deviation of each naked eye 3D visual area in a certain range can be realized by changing each naked eye 3D visual area again, after the whole deviation of each naked eye 3D visual area, the left eye of a human eye is just positioned in the left visual area, and the right eye is just positioned in the right visual area, so that the crosstalk problem of left and right eye images is reduced.

Description

Naked eye 3D display device and display method thereof

Technical Field

The embodiment of the invention relates to the field of naked eye 3D, in particular to naked eye 3D display equipment and a display method thereof.

Background

Cross talk (cross talk) is a very important factor affecting the 3D viewing effect. Both the viewing position and the design and process of the 3D display device itself can lead to crosstalk.

For a general naked eye 3D display device, the naked eye 3D viewing area can be roughly divided into a left viewing area, a right viewing area, and a crosstalk area. When both eyes are in the best viewing area, such as the left eye is just in the left viewing area and the right eye is just in the right viewing area, a better naked eye 3D image can be seen. When one of the eyes is located in the crosstalk zone, the images seen by both eyes have obvious double images, and the effect of 3D observation can be affected.

The range size of the crosstalk area varies from display device to display device due to the difference in resolution and implementation of 3D display.

In order to solve the problem of crosstalk between left and right eye images when the positions of the eyes are in a non-optimal observation area, an observation area where the eyes are positioned can be positioned by using a naked eye 3D eyeball tracking technology, and images displayed by each naked eye 3D visual area can be adjusted according to the observation area where the eyes are positioned so as to reduce the crosstalk between the left and right eye images. The design of a specific image adjustment scheme has certain difficulty, because after the display image corresponding to the crosstalk area is adjusted, the image displayed by the crosstalk area also affects the corresponding left visual area or right visual area, the crosstalk of the left-eye image and the right-eye image is reduced by adjusting the image displayed by each naked eye 3D visual area, and the image quality of the display equipment is difficult to ensure.

In summary, a better solution is needed to solve the problem of crosstalk between left and right eye images when the eyes of the observer are positioned in a non-optimal viewing area.

Disclosure of Invention

The embodiment of the invention provides naked eye 3D display equipment and a display method thereof, which are used for solving the problem of left-eye and right-eye image crosstalk when the positions of eyes of an observer are in a non-optimal observation area.

The embodiment of the invention provides a display method of naked eye 3D display equipment, wherein a display screen of the naked eye 3D display equipment comprises a plurality of rows and a plurality of columns of pixels; the grating structure of the naked eye 3D display device comprises a plurality of grating units which are sequentially arranged, wherein each grating unit comprises a grating and a slit which are adjacently arranged; at least one raster unit for each adjacent four rows of pixels, the method comprising:

acquiring the positions of two eyes of an observer when facing a display screen, wherein the positions of the two eyes are the spatial positions of the two eyes relative to the display screen;

judging whether the binocular positions fall into an optimal observation area of a naked eye 3D visual area or not, wherein the optimal observation area comprises an ideal left visual area and an ideal right visual area which belong to a pupil distance range;

and if the two eye positions do not fall into the optimal observation area, adjusting the image display of the row pixels corresponding to each grating unit so as to adjust the spatial position of the optimal observation area.

The embodiment of the invention provides a display method of naked eye 3D display equipment, wherein a display screen of the naked eye 3D display equipment comprises a plurality of rows and columns of pixels, and each column of pixels comprises three columns of sub-pixels; the grating structure of the naked eye 3D display device comprises a plurality of grating units which are sequentially arranged, wherein each grating unit comprises a grating and a slit which are adjacently arranged; at least every adjacent four columns of sub-pixels uniquely correspond to one grating unit; the method comprises the following steps:

acquiring the positions of two eyes of an observer when facing a display screen, wherein the positions of the two eyes are the spatial positions of the two eyes relative to the display screen;

judging whether the binocular positions fall into an optimal observation area of a naked eye 3D visual area or not, wherein the optimal observation area comprises an ideal left visual area and an ideal right visual area which belong to a pupil distance range;

and if the two eye positions do not fall into the optimal observation area, adjusting the image display of the column sub-pixels corresponding to each grating unit so as to adjust the spatial position of the optimal observation area.

The embodiment of the invention provides naked eye 3D display equipment, which comprises the following components:

a display screen including a plurality of rows and columns of pixels;

the grating structure comprises a plurality of grating units which are sequentially arranged, and each grating unit comprises a grating and a slit which are adjacently arranged; at least four adjacent rows of pixels uniquely correspond to one raster unit;

The human eye tracker is used for acquiring the positions of the eyes of an observer when the observer faces the display screen, wherein the positions of the eyes are the spatial positions of the eyes relative to the display screen; judging whether the binocular positions fall into an optimal observation area of the naked eye 3D visual area or not, wherein the optimal observation area comprises an ideal left visual area and an ideal right visual area which belong to a pupil distance range;

and the image processor is used for adjusting the image display of the row of pixels corresponding to each grating unit to adjust the space position of the optimal observation area when the eye tracker determines that the two eye positions do not fall into the optimal observation area.

The embodiment of the invention provides naked eye 3D display equipment, which comprises the following components:

the display screen comprises a plurality of rows and columns of pixels, and each column of pixels comprises three columns of sub-pixels;

the grating structure comprises a plurality of grating units which are sequentially arranged, and each grating unit comprises a grating and a slit which are adjacently arranged; at least every adjacent four columns of sub-pixels uniquely correspond to one grating unit;

the human eye tracker is used for acquiring the positions of the eyes of an observer when the observer faces the display screen, wherein the positions of the eyes are the spatial positions of the eyes relative to the display screen; judging whether the binocular positions fall into an optimal observation area of the naked eye 3D visual area or not, wherein the optimal observation area comprises an ideal left visual area and an ideal right visual area which belong to a pupil distance range;

And the image processor is used for adjusting the image display of the column sub-pixels corresponding to each grating unit to adjust the space position of the optimal observation area when the eye tracker determines that the two eye positions do not fall into the optimal observation area.

In the above embodiment, by adjusting the on-off control of each row of pixels, each naked eye 3D view area is changed again to realize the offset of each view area in a certain range, after the whole of each naked eye 3D view area is offset, the left eye of the human eye is just located in the left view area, and the right eye is just located in the right view area, so that the crosstalk problem of the left and right eye images is reduced.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:

fig. 1 is a schematic diagram of a method for dividing a naked eye 3D viewing area according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a display method of a naked eye 3D display device according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a method for determining an optimal observation area by using a naked eye 3D display device according to an embodiment of the present invention;

fig. 4a and fig. 4b are schematic diagrams of a third scenario and a fourth scenario provided by an embodiment of the present invention, respectively;

Fig. 5 is a schematic diagram of a display method of a naked eye 3D display device according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a method for determining an optimal observation area by using a naked eye 3D display device according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a naked eye 3D display device according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a naked eye 3D display device according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a naked eye 3D display device according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a naked eye 3D display device according to an embodiment of the present invention;

fig. 11 is a schematic diagram illustrating a positional deviation of a naked eye 3D viewing area of a naked eye 3D display device according to an embodiment of the present invention;

fig. 12 is a schematic diagram of an optimal viewing area of a naked eye 3D display device according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and effects solved by the present invention more apparent, preferred embodiments of the present invention will be described below with reference to the accompanying drawings of the specification, it being understood that the preferred embodiments described herein are for illustrating and explaining the present invention only and are not limiting the present invention. And embodiments and features of embodiments in this application may be combined with each other without conflict.

The naked eye 3D display device comprises a display screen, a backlight source and a grating structure (rear grating) arranged between the display panel (the display screen) and the backlight source, wherein light emitted from the backlight module is transmitted through a slit of the grating structure and is incident on pixels (or sub-pixels) of the display panel, a part of the pixels (or sub-pixels) on the display panel display left eye images, a part of the pixels (or sub-pixels) display right eye images, and the left eye images and the right eye images are alternately displayed in a 3D display mode, so that left eyes of observers see the left eye images, right eyes observe the right eye images, and naked eye 3D display is further realized.

Before introducing a display method of the naked eye 3D display device in the embodiment of the invention, the naked eye 3D visual area in the embodiment of the invention is described.

Because of the diffraction effect of light, crosstalk of the display screen and process deviation, it is difficult to realize that the right eye image is not seen at all in the left visual area and the left eye image is not seen at all in the right visual area, based on the above examples of the left visual area, the right visual area and the crosstalk area of the naked eye 3D device, the left visual area, the right visual area and the crosstalk area of the naked eye 3D display device in the embodiment of the present invention are defined as follows:

When the left eye image is a pure white image, the right eye image is a pure black image, and the pixels (or sub-pixels) of odd lines and even lines on the display panel are driven to be alternately opened, the left eye image displayed by the display screen is the pure white image, the right eye image displayed by the display screen is the pure black image, the left eye image and the right eye image are observed by making eyes positioned in different observation areas of the display screen, meanwhile, the ratio of the brightness of the image entering the left eye of an observer to the brightness of the image entering the right eye of the observer is detected, for simplicity, the ratio of the brightness of the left eye to the brightness of the right eye is represented by L/R, the observation area with the L/R larger than a first threshold is defined as a left visual area, the observation area with the L/R smaller than a second threshold is defined as a right visual area, and the observation area with the L/R between the first threshold and the second threshold is defined as a crosstalk area. For example, the first threshold is 5, the second threshold is 0.2 (the second threshold is the inverse of the first threshold), then an observation region with an L/R greater than 5 is defined as the left viewing region, an observation region with an L/R between 0.2 and 5 is defined as the crosstalk region, and an observation region with an L/R less than 0.2 is defined as the right viewing region. The purpose of this division is to determine that the visible region in which the left-eye image (the right-eye image has extremely low brightness) is mainly seen is the left-eye region, the visible region in which the right-eye image is mainly seen is the right-eye image, the visible region in which the left-eye image and the right-eye image are seen is the crosstalk region, the eyes in the crosstalk region can clearly see both the left-eye image and the right-eye image, and the crosstalk between the left-eye image and the right-eye image produces serious ghost.

In the following, as shown in fig. 1, a pixel (or sub-pixel) for displaying a left-eye image is L, and a pixel (or sub-pixel) for displaying a right-eye image is R. The image displayed by the pixel (or sub-pixel) L is partially or wholly visible outside the display screen, and the image displayed by the pixel (or sub-pixel) R is partially or wholly visible outside the display screen with reference to the visible range indicated by the double-headed arrow in fig. 1, and as can be seen in fig. 1, there are a plurality of overlapping areas between the visible area of each pixel (or sub-pixel) L and the visible area of each pixel (or sub-pixel) R. Of the observation areas formed by these overlapping areas, some areas mainly see left-eye images, some areas mainly see right-eye images, and some areas can see both left-eye and right-eye images. The 3D display effect of the naked eye 3D display device is related to the position of the observer, and if the left eye of the observer is located in the region where the left eye image is mainly seen and the right eye is located in the region where the right eye image is mainly seen, a better naked eye 3D effect can be observed.

According to the definition, a visual area of an image displayed by the naked eye 3D display device is divided into a left visual area, a right visual area and a crosstalk area.

It should be noted that, in the embodiment of the present invention, since one raster unit corresponds to at least every four adjacent rows of pixels or one raster unit corresponds to at least every four columns of sub-pixels, each of the left viewing area, the right viewing area and the crosstalk area is obtained based on the display content of at least every four adjacent rows of pixels or at least every four columns of sub-pixels corresponding to each raster unit.

For example, one raster unit corresponds to every four adjacent rows of pixels, when the naked eye 3D display device performs 3D display, the first row of pixels and the second row of pixels corresponding to each raster unit display a left eye image, the third row of pixels and the fourth row of pixels corresponding to each raster unit display a right eye image, then the visible area corresponding to the displayed image is divided into a left visual area, a right visual area and a crosstalk area, and the spatial positions of the naked eye 3D visual areas relative to the display screen are stored.

The spatial position of the observer relative to the display screen determines the corresponding relation between the left eye and the right eye of the observer and each visual area, and the optimal 3D display effect is observed only if the left eye is positioned in the left visual area and the right eye is positioned in the right visual area. The left eye is located in a right viewing zone or a crosstalk zone and the right eye is located in a crosstalk zone or a left viewing zone, the 3D effect of the observed image is affected. According to the embodiment of the invention, the tracking of the positions of the eyes and the spatial position of the naked eye 3D visual area is realized through one human eye tracker.

The human eye tracker tracks the positions of eyes, mainly comprising:

firstly, a front camera of naked eye 3D display equipment shoots a face image, and the face image when an observer faces to a display screen of the naked eye 3D display equipment is mainly shot;

secondly, determining the spatial positions of eyes of an observer relative to a display screen according to the shot face image;

for example, the coordinates of the two eyes, i.e., the left eye pupil and the right eye pupil, in the face image are first identified; then, according to the positions of the eyes, the center positions of the eyes and the interpupillary distances of the eyes in the face image are obtained; then, according to the coordinates of the left eye pupil and the right eye pupil, calculating the coordinates of the centers of the two eyes and the interpupillary distance between the two eyes, wherein the coordinates of the centers of the two eyes are the coordinates of the midpoint of the connecting line of the coordinates of the pupils of the two eyes, and the interpupillary distance between the coordinates of the pupils of the two eyes; finally, according to the interpupillary distance of the two eyes, the physical distance of the two eyes of the observer relative to the display screen can be determined, and then according to the coordinates of the pupils of the left eye and the pupils of the right eye, the spatial positions of the left eye and the right eye relative to the display screen can be determined.

In the embodiment of the invention, the spatial positions of the naked eye 3D visual area are adjusted by adjusting at least four rows of pixels corresponding to each grating unit or at least four columns of left and right eye images displayed by sub-pixels corresponding to each grating unit, so that the naked eye 3D visual area is offset, and the human eye tracker can track the spatial positions of the naked eye 3D visual area before and after the offset.

In the embodiment of the invention, compared with the prior art, two adjacent rows of pixels corresponding to each grating unit are changed into four or more adjacent rows of pixels corresponding to each grating unit, and accordingly, each pixel of the display device is divided into two halves, the on and off of each half pixel are independently controlled so as to increase the area range of a left visual area or a right visual area, after the position of human eyes is tracked, the on and off control of each row of pixels (or each column of sub-pixels) is adjusted, the 3D visual areas of naked eyes are changed again to realize the offset of each visual area in a certain range, and after the 3D visual areas of naked eyes are offset integrally, the left eyes of human eyes are just positioned in the left visual area, and the right eyes are just positioned in the right visual area, so that the crosstalk problem of left and right eye images is further reduced.

It should be noted that, in the embodiment of the present invention, two adjacent rows of pixels corresponding to each grating unit are changed to four or more adjacent rows of pixels corresponding to each grating unit, and the shape of the grating structure can be adjusted so that the number of grating units is reduced to half of the number of the existing grating units, and one grating unit at least corresponds to four adjacent rows of pixels (or four columns of sub-pixels); the number of row pixels (or the number of column pixels) on the display panel can also be increased by 2 times as much as the existing number by keeping the raster structure unchanged, so that one raster unit corresponds to at least every adjacent four rows of pixels (or four columns of sub-pixels).

It should be noted that, in the embodiment of the present invention, the range of the overall offset of each naked eye 3D viewing area is not greater than one pupil distance range.

Based on the content of the naked eye 3D viewing area and the binocular position tracking in the above embodiment, a display method of the naked eye 3D display device provided by the embodiment of the present invention is described in detail.

As shown in fig. 2, an embodiment of the present invention provides a display method of a naked eye 3D display device, including:

step 201, obtaining the positions of eyes of an observer facing the display screen, wherein the positions of eyes are the spatial positions of eyes relative to the display screen;

step 202, judging whether the positions of the eyes fall into an optimal observation area of a naked eye 3D visual area, wherein the optimal observation area comprises an ideal left visual area and an ideal right visual area which belong to a pupil distance range;

in step 203, if the binocular positions do not fall into the optimal observation area, the image display of the row pixels corresponding to each raster unit is adjusted to adjust the spatial position of the optimal observation area.

The naked eye 3D display device realizes naked eye 3D display through the rear grating, and the grating structure of the naked eye 3D display device is positioned between the display screen and the backlight source. The display screen of the naked eye 3D display device includes a plurality of rows and columns of pixels, each column of pixels including three columns of subpixels. The grating structure of the naked eye 3D display device comprises a plurality of grating units which are sequentially arranged, and each grating unit comprises a grating and a slit which are adjacently arranged. In order to realize that the spatial positions of the whole naked eye 3D visual area and the optimal observation area of the naked eye 3D visual area move along with the change of image display, at least four adjacent rows of pixels of the display screen are uniquely corresponding to one grating unit. The display method of the embodiment of the invention is suitable for naked eye 3D display equipment of vertical screen display, and the grating unit is parallel to each row of pixels and perpendicular to each column of sub-pixels.

In a preferred embodiment, each four adjacent rows of pixels uniquely corresponds to a raster unit, and each four adjacent rows of pixels sequentially includes a first row of pixels, a second row of pixels, a third row of pixels, and a fourth row of pixels. The above method flow is described below in connection with an example in which each adjacent four rows of pixels uniquely corresponds to one raster unit.

As shown in fig. 3, before step 201, the method further includes:

step 301, controlling the first row of pixels and the second row of pixels corresponding to each raster unit to display a left eye image, and controlling the third row of pixels and the fourth row of pixels corresponding to each raster unit to display a right eye image;

step 302, determining the spatial position of a naked eye 3D visual area according to the image display of the row pixels corresponding to each grating unit, wherein the naked eye 3D visual area comprises a left visual area, a right visual area and a crosstalk area;

step 303, determining an optimal observation area of the naked eye 3D visual area according to the spatial position of the naked eye 3D visual area. The optimal viewing area is a visual area including an ideal left visual area and an ideal right visual area within a pupil distance range, the left eye position is in the ideal left visual area, when the right eye position is in the ideal right visual area, the left eye and the right eye have no crosstalk, the optimal 3D display effect can be observed, and the optimal viewing area generally corresponds to the central area of the display screen. A schematic diagram of the optimal viewing area including the ideal left and right viewing areas is shown in fig. 12.

In a preferred embodiment, for different observers, the naked eye 3D viewing area conforming to the pupil distance characteristics of the observers can be calibrated, and specifically, the spatial position of the naked eye 3D viewing area is determined according to the following manner:

step one, displaying a frame of naked eye 3D correction image, wherein the naked eye 3D correction image comprises a left eye correction image and a right eye correction image, and the left eye correction image and the right eye correction image are obviously different;

for example, the left-eye corrected image is a red image, and the right-eye corrected image is a blue image. Red images and are clearly distinguished from blue images. When the correction is carried out, the left eye and the right eye are alternately closed, so that the observer moves the positions of the two eyes until the left eye is closed, the right eye only observes the mainly blue image, the observed red image has the lowest brightness, and when the observer closes the right eye, the left eye mainly observes the red image and the blue image to have the lowest brightness, and the optimal observation position is obtained at the moment.

Step two, displaying first prompt information, wherein the first prompt information is used for prompting an observer to face the display screen, alternately closing left eyes and right eyes so as to adjust the positions of the left eyes and the right eyes relative to the display screen to be optimal observation positions according to images alternately observed by the left eyes and the right eyes, and feeding back confirmation information when the first prompt information is used for prompting the observer to determine that the positions of the left eyes and the right eyes relative to the display screen are optimal observation positions;

When receiving the confirmation information, shooting a face correction image when an observer faces to the display screen;

step four, according to the face correction image, determining the calibrated pupil distance of the eyes of the observer and the calibrated center position of the eyes;

and fifthly, correcting the spatial positions of the naked eye 3D visual areas obtained in the steps 301 to 303 according to the deviation of the calibrated center positions of the eyes and the center position of the display screen, and obtaining a calibrated left visual area, right visual area and crosstalk area. And (3) calibrating the naked eye 3D visual area in advance, and adjusting the display of the image based on the corresponding relation between the calibrated naked eye 3D visual area and the binocular position, so that the ghost image generated by the left eye image and the right eye image can be further weakened when eyes positioned in the crosstalk area simultaneously see. Based on the optimal viewing area of the naked eye 3D viewing area determined in steps 301 to 303, and the ideal left viewing area and the ideal right viewing area included in the optimal viewing area and belonging to a range of interpupillary distances, step 203 specifically includes:

and if the left eye position does not fall into the ideal left visual zone of the optimal observation area, the right eye position does not fall into the ideal right visual zone of the optimal observation area, and adjusting the image display of the first row of pixels to the fourth row of pixels corresponding to each grating unit.

In the above method flow, the left eye position does not fall into the ideal left view zone of the optimal viewing area, and the right eye position does not fall into the ideal right view zone of the optimal viewing area, including the left-right shift of the observer facing the display screen along the optimal viewing area, or the front-back shift of the observer facing the display screen.

The observer shifts left and right along the optimal viewing area towards the display screen, resulting in a left eye position that does not fall into the ideal left view region of the optimal viewing area, and a right eye position that does not fall into the ideal right view region of the optimal viewing area, comprising two scenarios:

the first scene, the left eye position and the right eye position are respectively positioned at the left half pupil distance of the ideal left visual zone and the ideal right visual zone;

and in a second scene, the left eye position and the right eye position are respectively positioned at the left ideal viewing zone and the right ideal viewing zone by half a pupil distance to the right.

For scenario one, step 203 specifically includes: the first row of pixels corresponding to each raster unit is controlled to display a left eye image, the second row of pixels and the third row of pixels display a right eye image, and the fourth row of pixels display a left eye image so as to shift the optimal viewing area to the left by half a pupil distance.

By adjusting the display images of the first row of pixels to the fourth row of pixels corresponding to each raster unit, the spatial position of the best viewing area is shifted, as shown in fig. 11. The first to fourth rows of pixels corresponding to each raster unit respectively display a left eye image, a right eye image, and a left eye image, and when the optimal viewing area determined in step 303 is formed, the first to fourth rows of pixels corresponding to each raster unit respectively display a left eye image, a right eye image, and compared with the whole naked eye 3D viewing area, the lower naked eye 3D viewing area is left offset, as shown in fig. 11, the upper naked eye 3D viewing area is left offset, and the whole naked eye 3D viewing area is left offset by half a pupil distance, and the ideal left viewing area and the ideal right viewing area of the optimal viewing area are also left offset by half a pupil distance, so that the space position of the optimal viewing area is left offset by half a pupil distance, and the left eye position is right viewing area is right ideal viewing area after adjustment.

For scenario two, step 203 specifically includes: the first row of pixels corresponding to each raster unit is controlled to display a right eye image, the second row of pixels and the third row of pixels display a left eye image, and the fourth row of pixels display a right eye image so as to shift the optimal viewing area by half a pupil distance to the right.

And when the optimal viewing area determined in the step 303 is formed, the first row of pixels corresponding to each raster unit to the fourth row of pixels respectively display the left eye image, the left eye image and the right eye image, and compared with the whole naked eye 3D viewing area, the whole naked eye 3D viewing area is shifted to the right, and the whole naked eye 3D viewing area is shifted by taking half of the pupil distance as a step length according to the adjustment mode, so that the ideal left viewing area and the ideal right viewing area of the optimal viewing area are also shifted to the left by half of the pupil distance, and therefore, after the spatial position of the optimal viewing area is shifted to the left by half of the pupil distance through the adjustment of the display image of the first row of pixels corresponding to each raster unit to the fourth row of pixels, the left eye position is positioned in the ideal left viewing area of the adjusted optimal viewing area, and the right eye position is positioned in the ideal right viewing area of the adjusted optimal viewing area. For a first scene and a second scene, each four adjacent rows of pixels uniquely correspond to one grating unit, the slits of the grating units correspond to one row of pixels, and the gratings of the grating units correspond to three adjacent rows of pixels; alternatively, each four adjacent rows of pixels uniquely corresponds to one raster unit, the slits of the raster units correspond to two adjacent rows of pixels, and the rasters of the raster units correspond to two other adjacent rows of pixels.

An observer-facing display screen offset back and forth along an optimal viewing area, resulting in a left eye position that does not fall within an ideal left view region of the optimal viewing area and a right eye position that does not fall within an ideal right view region of the optimal viewing area, comprising:

the third scene is that the vertical distance between the two eyes and the display screen is longer, the vertical distance between the two eyes and the display screen is not smaller than the furthest observation distance, and the furthest observation distance is the furthest vertical distance between the two eyes and the display screen when an observer is positioned in the optimal observation area; referring to fig. 4a, an, bn, cn, dn represents the first to fourth rows of pixels, respectively.

A fourth scene, when the vertical distance between the two eyes and the display screen is relatively short, the vertical distance between the two eyes and the display screen is not larger than the nearest observation distance, and the nearest observation distance is the nearest vertical distance between the two eyes and the display screen when an observer is positioned in the optimal observation area; referring to fig. 4b, an, bn, cn, dn represents the first to fourth rows of pixels, respectively.

The closest and farthest viewing distances may be determined as follows:

a left-eye correction image for correcting an optimal observation position of the observer, which is a red image, and a right-eye correction image, which is a blue image, are displayed. When the correction is carried out, the left eye and the right eye are alternately closed, so that the observer moves the positions of the two eyes until the left eye is closed, the right eye only observes the mainly blue image, the observed red image has the lowest brightness, and when the observer closes the right eye, the left eye mainly observes the red image and the blue image to have the lowest brightness, and the optimal observation position is obtained at the moment. Based on the above, the observer is prompted to move forwards or backwards towards the display screen, the observer alternately closes the left eye and the right eye, only the red image is seen by the left eye, and when only the blue image is seen by the right eye, the nearest vertical distance between the left eye and the right eye relative to the display screen is determined as the nearest observation position; when the left eye only sees the red image and the right eye only sees the blue image, the furthest vertical distance between the left and right eyes and the display screen is determined as the furthest observation position.

In an alternative embodiment, if each adjacent four rows of pixels uniquely corresponds to one raster unit, and the slits of the raster unit correspond to one row of pixels, the raster of the raster unit corresponds to three adjacent rows of pixels; as shown in fig. 4a and 4b, the embodiment of the present invention can also solve the problem that the binocular positions related to the third and fourth scenes do not fall into the optimal viewing areas by adjusting the image display of the first to fourth rows of pixels corresponding to each raster unit. For scene three, based on the structural features of the slits of the raster unit corresponding to one row of pixels and the raster of the raster unit corresponding to three adjacent rows of pixels, step 203 includes the following adjustment modes:

the first adjustment mode is as follows: and if the vertical distance between the two eye positions and the display screen is near the farthest observing distance, controlling the first row of pixels corresponding to each grating unit to display the left eye image, and controlling the second row of pixels corresponding to each grating unit to display the right eye image so as to adjust the movement of the space position of the optimal observing area, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observing area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observing area.

Optionally, if the vertical distance between the binocular position and the display screen is continuously greater than the furthest observation distance, (excluding the case that the vertical distance between the binocular position and the display screen is too far and exceeds the adjustment range of the embodiment of the present invention), the first row of pixels corresponding to each raster unit are controlled to display the left eye image, the second row of pixels corresponding to each raster unit are controlled to display the right eye image, and at the same time, the third row of pixels corresponding to each raster unit are controlled to display the full black image, and the fourth row of pixels corresponding to each raster unit are controlled to display the full black image.

The second adjustment mode is as follows: and if the vertical distance between the two eye positions and the display screen is near the farthest observing distance, controlling the second row of pixels corresponding to each grating unit to display the left eye image, and controlling the third row of pixels corresponding to each grating unit to display the right eye image so as to adjust the movement of the space position of the optimal observing area, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observing area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observing area.

Optionally, if the vertical distance between the binocular position and the display screen is continuously greater than the furthest observation distance, (excluding the case that the vertical distance between the binocular position and the display screen is too far and exceeds the adjustment range of the embodiment of the present invention), the second row of pixels corresponding to each raster unit is controlled to display the left eye image, the third row of pixels corresponding to each raster unit is controlled to display the right eye image, and at the same time, the first row of pixels corresponding to each raster unit is controlled to display the full black image, and the fourth row of pixels corresponding to each raster unit is controlled to display the full black image.

Third adjustment mode: and if the vertical distance between the two eye positions and the display screen is near the furthest observation distance, controlling the third row of pixels corresponding to each grating unit to display the left eye image, and controlling the fourth row of pixels corresponding to each grating unit to display the right eye image, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observation area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observation area.

Optionally, if the vertical distance between the binocular position and the display screen is continuously greater than the furthest observation distance, (excluding the case that the vertical distance between the binocular position and the display screen is too far and exceeds the adjustment range of the embodiment of the present invention), the third row of pixels corresponding to each raster unit is controlled to display the left eye image, the fourth row of pixels corresponding to each raster unit is controlled to display the right eye image, and at the same time, the first row of pixels corresponding to each raster unit is also controlled to display the full black image, and the second row of pixels corresponding to each raster unit is controlled to display the full black image.

Fourth adjustment mode: and if the vertical distance between the two eye positions and the display screen is near the farthest observing distance, controlling the fourth row of pixels to display the left eye image, and controlling the first row of pixels to display the right eye image so as to adjust the movement of the space position of the optimal observing area, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observing area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observing area.

Optionally, if the vertical distance between the binocular position and the display screen is continuously greater than the furthest observation distance, (excluding the case that the vertical distance between the binocular position and the display screen is too far and exceeds the adjustment range of the embodiment of the present invention), the fourth row of pixels corresponding to each raster unit is controlled to display the left eye image, the first row of pixels corresponding to each raster unit is controlled to display the right eye image, and at the same time, the second row of pixels corresponding to each raster unit is also controlled to display the full black image, and the third row of pixels corresponding to each raster unit is controlled to display the full black image.

The four adjustment modes can be recycled, so that the problem that the eyes of an observer move left and right when moving back and forth relative to the display screen is solved.

For scene four, based on the structural features of the slits of the raster unit corresponding to one row of pixels and the raster of the raster unit corresponding to three adjacent rows of pixels, step 203 includes the following adjustment modes:

the first adjustment mode is as follows: and if the vertical distance between the two eye positions and the display screen is near the nearest observation distance, controlling the first row of pixels corresponding to each grating unit to display a left eye image, and controlling the third row of pixels corresponding to each grating unit to display a right eye image so as to adjust the movement of the spatial position of the optimal observation area, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observation area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observation area.

Optionally, if the vertical distance between the binocular position and the display screen is smaller than the nearest viewing distance (excluding the case that the vertical distance between the binocular position and the display screen is too small and exceeds the adjustment range of the embodiment of the present invention), the first row of pixels corresponding to each raster unit is controlled to display the left eye image, the third row of pixels corresponding to each raster unit is controlled to display the right eye image, and at the same time, the second row of pixels corresponding to each raster unit is controlled to display the full black image, and the fourth row of pixels corresponding to each raster unit is controlled to display the full black image.

The second adjustment mode is as follows: and if the vertical distance between the two eye positions and the display screen is near the nearest observation distance, controlling the second row of pixels corresponding to each grating unit to display the left eye image, and controlling the fourth row of pixels corresponding to each grating unit to display the right eye image so as to adjust the movement of the spatial position of the optimal observation area, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observation area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observation area.

Optionally, if the vertical distance between the two eye positions and the display screen is smaller than the nearest viewing distance, (excluding the case that the vertical distance between the two eye positions and the display screen is too short and exceeds the adjustment range of the embodiment of the present invention), the second row of pixels corresponding to each raster unit are controlled to display the left eye image, the fourth row of pixels corresponding to each raster unit are controlled to display the right eye image, the first row of pixels corresponding to each raster unit are also controlled to display the full black image, and the third row of pixels corresponding to each raster unit are controlled to display the full black image, so as to adjust the movement of the spatial position of the optimal viewing area, so that the left eye position is located in the ideal left viewing area of the adjusted optimal viewing area, and the right eye position is located in the ideal right viewing area of the adjusted optimal viewing area.

Third adjustment mode: and if the vertical distance between the two eye positions and the display screen is near the nearest observation distance, controlling the first row of pixels corresponding to each grating unit to display a right eye image, and controlling the third row of pixels corresponding to each grating unit to display a left eye image so as to adjust the movement of the spatial position of the optimal observation area, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observation area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observation area.

Optionally, if the vertical distance between the two eye positions and the display screen is smaller than the nearest viewing distance (excluding the case that the vertical distance between the two eye positions and the display screen is too short and exceeds the adjustment range of the embodiment of the present invention), the first row of pixels corresponding to each raster unit are controlled to display the right eye image, the third row of pixels corresponding to each raster unit are controlled to display the left eye image, the second row of pixels corresponding to each raster unit are also controlled to display the full black image, and the fourth row of pixels corresponding to each raster unit are controlled to display the full black image, so as to adjust the movement of the spatial position of the optimal viewing area, so that the left eye position is located in the ideal left viewing area of the adjusted optimal viewing area, and the right eye position is located in the ideal right viewing area of the adjusted optimal viewing area.

Fourth adjustment mode: and if the vertical distance between the two eye positions and the display screen is near the nearest observation distance, controlling the second row of pixels corresponding to each grating unit to display the right eye image, and controlling the fourth row of pixels corresponding to each grating unit to display the left eye image so as to adjust the movement of the spatial position of the optimal observation area, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observation area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observation area.

Optionally, if the vertical distance between the two eye positions and the display screen is smaller than the nearest viewing distance (excluding the case that the vertical distance between the two eye positions and the display screen is too short and exceeds the adjustment range of the embodiment of the present invention), the second row of pixels corresponding to each raster unit is controlled to display the right eye image, the fourth row of pixels corresponding to each raster unit is controlled to display the left eye image, the first row of pixels corresponding to each raster unit is also controlled to display the full black image, and the third row of pixels corresponding to each raster unit is controlled to display the full black image, so as to adjust the movement of the spatial position of the optimal viewing area, so that the left eye position is located in the ideal left viewing area of the adjusted optimal viewing area, and the right eye position is located in the ideal right viewing area of the adjusted optimal viewing area.

The four adjustment modes can be recycled, so that the problem that the eyes of an observer move left and right when moving back and forth relative to the display screen is solved.

In the above method flow step 203, for the scene where the binocular position does not fall into the optimal observation area and the spatial distance of the binocular position deviated from the optimal observation area is within the adjustment range of the embodiment of the present invention, the overall deviation of the naked eye 3D viewing area is realized by adjusting the image display from the first row of pixels to the fourth row of pixels corresponding to each raster unit, so as to ensure that the binocular position is located in the offset posterior optimal observation area after the deviation of the optimal observation area.

If it is determined in the above step 202 that the binocular position does not fall into the optimal viewing area and the vertical distance between the binocular position and the display screen is too far or too close, which exceeds the adjustable range of the embodiment of the present invention, the method further includes, before step 203:

and displaying second prompting information, wherein the second prompting information is used for prompting an observer to adjust the spatial positions of the left eye and the right eye relative to the display screen so as to enable the spatial distance of the positions of the two eyes to deviate from the optimal observation area to be within the adjustment range of the embodiment of the invention.

When the observer moves the positions of the eyes, and after adjusting the spatial positions of the left and right eyes with respect to the display screen, the spatial distance of the positions of the eyes from the optimal observation area is within an adjustable range, step 203 may be performed according to several scene examples in the above-described embodiments.

In the embodiment of the present invention, the adjustable range of the whole naked eye 3D viewing area (including the optimal viewing area) may determine the appropriate threshold according to the simulated binocular positions and the adjustment ranges of all the adjustment schemes of the above embodiment.

Optionally, in the step 202, if it is determined that the binocular positions do not fall into the optimal observation area and the spatial distance of the binocular positions deviating from the optimal observation area is too far or too close, which exceeds the adjustable range of the embodiment of the present invention, the method further includes: and switching the 3D image displayed by the display screen into a 2D image. Based on the same inventive concept, the embodiment of the invention also provides another display method of the naked eye 3D display device, as shown in fig. 5, including:

step 501, obtaining the positions of eyes of an observer facing a display screen, wherein the positions of eyes are the spatial positions of eyes relative to the display screen;

step 502, judging whether the positions of the eyes fall into an optimal observation area of a naked eye 3D visual area, wherein the optimal observation area comprises an ideal left visual area and an ideal right visual area which belong to a pupil distance range;

in step 503, if the binocular position does not fall into the optimal viewing area, the image display of the column sub-pixels corresponding to each raster unit is adjusted to adjust the spatial position of the optimal viewing area.

It is worth to say that, the naked eye 3D display device realizes naked eye 3D display through the rear grating, and the grating structure is located between the display screen and the backlight source. The display screen of the naked eye 3D display device includes a plurality of rows and columns of pixels, each column of pixels including three columns of subpixels. The grating structure of the naked eye 3D display device comprises a plurality of grating units which are sequentially arranged, and each grating unit comprises a grating and a slit which are adjacently arranged. The corresponding relation exists between a plurality of rows of pixels of the display screen and a plurality of grating units of the grating structure, so that the spatial positions of the whole naked eye 3D visual area and the optimal observation area of the naked eye 3D visual area move along with the change of image display, and at least four adjacent columns of sub-pixels of the display screen are enabled to be uniquely corresponding to one grating unit. The display method of the embodiment of the invention is suitable for naked eye 3D display equipment of horizontal screen display, and the grating unit is parallel to each column of sub-pixels and perpendicular to each row of pixels.

In a preferred embodiment, each adjacent four columns of sub-pixels uniquely corresponds to one raster unit; each four adjacent columns of sub-pixels sequentially comprise a first column of sub-pixels, a second column of sub-pixels, a third column of sub-pixels and a fourth column of sub-pixels, and the flow of the method is described below by combining an example that each four adjacent columns of sub-pixels uniquely corresponds to one raster unit.

As shown in fig. 6, before step 501, the method further includes:

step 601, controlling a first column of sub-pixels and a second column of sub-pixels corresponding to each raster unit to display a left eye image, and controlling a third column of sub-pixels and a fourth column of sub-pixels corresponding to each raster unit to display a right eye image;

step 602, determining the spatial position of a naked eye 3D viewing area according to the image display of the column sub-pixels corresponding to each grating unit, wherein the naked eye 3D viewing area comprises a left viewing area, a right viewing area and a crosstalk area;

and step 603, determining an optimal observation area of the naked eye 3D visual area according to the spatial position of the naked eye 3D visual area.

In step 603, the optimal viewing area is a visual area including an ideal left viewing area and an ideal right viewing area within a range of interpupillary distance, where the left eye position is in the ideal left viewing area, and when the right eye position is in the ideal right viewing area, there is no crosstalk between the left and right eyes, and an optimal 3D display effect is observed, and typically the optimal viewing area corresponds to a central area of the display screen.

In a preferred embodiment, for different observers, the naked eye 3D viewing area conforming to the pupil distance characteristics of the observers can be calibrated, and specifically, the spatial position of the naked eye 3D viewing area is determined according to the following manner:

Step one, displaying a frame of naked eye 3D correction image, wherein the naked eye 3D correction image comprises a left eye correction image and a right eye correction image, and the left eye correction image and the right eye correction image are obviously different;

for example, the left-eye corrected image is a red image, and the right-eye corrected image is a blue image. Red images and are clearly distinguished from blue images. When the correction is carried out, the left eye and the right eye are alternately closed, so that the observer moves the positions of the two eyes until the left eye is closed, the right eye only observes the mainly blue image, the observed red image has the lowest brightness, and when the observer closes the right eye, the left eye mainly observes the red image and the blue image to have the lowest brightness, and the optimal observation position is obtained at the moment.

Step two, displaying first prompt information, wherein the first prompt information is used for prompting an observer to face the display screen, alternately closing left eyes and right eyes so as to adjust the positions of the left eyes and the right eyes relative to the display screen to be optimal observation positions according to images alternately observed by the left eyes and the right eyes, and feeding back confirmation information when the first prompt information is used for prompting the observer to determine that the positions of the left eyes and the right eyes relative to the display screen are optimal observation positions;

when receiving the confirmation information, shooting a face correction image when an observer faces to the display screen;

Step four, according to the face correction image, determining the calibrated pupil distance of the eyes of the observer and the calibrated center position of the eyes;

and fifthly, correcting the spatial positions of the naked eye 3D visual areas obtained in the steps 501 to 503 according to the deviation of the calibrated center positions of the eyes and the center position of the display screen, and obtaining a calibrated left visual area, right visual area and crosstalk area. And (3) calibrating the naked eye 3D visual area in advance, and adjusting the display of the image based on the corresponding relation between the calibrated naked eye 3D visual area and the binocular position, so that the ghost image generated by the left eye image and the right eye image can be further weakened when eyes positioned in the crosstalk area simultaneously see.

Based on the optimal viewing area of the naked eye 3D viewing area determined in steps 601 to 603, and the ideal left viewing area and the ideal right viewing area included in the optimal viewing area and belonging to a pupil distance range, the step 503 specifically includes:

and if the left eye position does not fall into the ideal left visual area and the right eye position does not fall into the ideal right visual area, adjusting the image display of the first column of sub-pixels to the fourth column of sub-pixels corresponding to each grating unit.

In the above method flow, the left eye position does not fall into the ideal left view zone of the optimal viewing area, and the right eye position does not fall into the ideal right view zone of the optimal viewing area, including the left-right shift of the observer facing the display screen along the optimal viewing area, or the front-back shift of the observer facing the display screen.

The observer shifts left and right along the optimal viewing area towards the display screen, resulting in a left eye position that does not fall into the ideal left view region of the optimal viewing area, and a right eye position that does not fall into the ideal right view region of the optimal viewing area, comprising two scenarios:

the first scene, the left eye position and the right eye position are respectively positioned at the left half pupil distance of the ideal left visual zone and the ideal right visual zone;

and in a second scene, the left eye position and the right eye position are respectively positioned at the left ideal viewing zone and the right ideal viewing zone by half a pupil distance to the right.

For scenario one, step 503 specifically includes: the first column of subpixels corresponding to each raster unit is controlled to display a left eye image, the second column of subpixels and the third column of subpixels display a right eye image, and the fourth column of subpixels display a left eye image so as to shift the optimal viewing area to the left by half a pupil distance.

By adjusting the display images of the first column of sub-pixels to the fourth column of sub-pixels corresponding to each raster unit, the spatial position of the optimal viewing area is shifted, as shown in fig. 11. The first to fourth columns of sub-pixels corresponding to each raster unit respectively display a left eye image, a right eye image, and a left eye image, and when the optimal viewing area determined in the step 303 is formed, the first to fourth columns of sub-pixels corresponding to each raster unit respectively display a left eye image, a right eye image, and compared with the whole naked eye 3D viewing area, the lower naked eye 3D viewing area is left shifted, the upper naked eye 3D viewing area is left shifted, and the whole naked eye 3D viewing area is left shifted, and the ideal left viewing area and the ideal right viewing area of the optimal viewing area are left shifted by half a pupil distance, so that the spatial position of the optimal viewing area is left shifted by half a pupil distance, the ideal viewing area is left and right viewing area is right after the ideal viewing area is adjusted.

For scenario two, step 503 specifically includes: the first column of subpixels corresponding to each raster unit is controlled to display a right-eye image, the second column of subpixels and the third column of subpixels display a left-eye image, and the fourth column of subpixels display a right-eye image so as to shift the optimal viewing area by half a pupil distance to the right.

The first column of sub-pixels corresponding to each raster unit to the fourth column of sub-pixels respectively display a right eye image, a left eye image, and a right eye image, and when the best viewing area determined in the forming step 303 is formed, the first column of sub-pixels corresponding to each raster unit to the fourth column of sub-pixels respectively display a left eye image, a right eye image, and the whole naked eye 3D viewing area is shifted rightward, and the whole naked eye 3D viewing area is shifted by half a pupil distance as a step length according to the above adjustment method, so that the ideal left viewing area and the ideal right viewing area of the best viewing area are similarly shifted leftward by half a pupil distance, and therefore, by the above adjustment of the display image from the first column of sub-pixels corresponding to each raster unit to the fourth column of sub-pixels, the spatial position of the best viewing area is shifted leftward by half a pupil distance, the left eye position is located at the ideal left viewing area of the adjusted best viewing area, and the right eye position is located at the ideal right viewing area of the adjusted best viewing area.

For a first scene and a second scene, each four adjacent rows of pixels uniquely correspond to one grating unit, the slits of the grating units correspond to one row of pixels, and the gratings of the grating units correspond to three adjacent rows of pixels; alternatively, each four adjacent rows of pixels uniquely corresponds to one raster unit, the slits of the raster units correspond to two adjacent rows of pixels, and the rasters of the raster units correspond to two other adjacent rows of pixels.

An observer-facing display screen offset back and forth along an optimal viewing area, resulting in a left eye position that does not fall within an ideal left view region of the optimal viewing area and a right eye position that does not fall within an ideal right view region of the optimal viewing area, comprising:

the third scene is that the vertical distance between the two eyes and the display screen is longer, the vertical distance between the two eyes and the display screen is not smaller than the furthest observation distance, and the furthest observation distance is the furthest vertical distance between the two eyes and the display screen when an observer is positioned in the optimal observation area; referring to fig. 4a, an, bn, cn, dn represents the first to fourth columns of sub-pixels, respectively.

A fourth scene, when the vertical distance between the two eyes and the display screen is relatively short, the vertical distance between the two eyes and the display screen is not larger than the nearest observation distance, and the nearest observation distance is the nearest vertical distance between the two eyes and the display screen when an observer is positioned in the optimal observation area; referring to fig. 4b, an, bn, cn, dn represents the first to fourth columns of sub-pixels, respectively.

The closest and farthest viewing distances may be determined as follows:

a left-eye correction image for correcting an optimal observation position of the observer, which is a red image, and a right-eye correction image, which is a blue image, are displayed. When the correction is carried out, the left eye and the right eye are alternately closed, so that the observer moves the positions of the two eyes until the left eye is closed, the right eye only observes the mainly blue image, the observed red image has the lowest brightness, and when the observer closes the right eye, the left eye mainly observes the red image and the blue image to have the lowest brightness, and the optimal observation position is obtained at the moment. Based on the above, the observer is prompted to move forwards or backwards towards the display screen, the observer alternately closes the left eye and the right eye, only the red image is seen by the left eye, and when only the blue image is seen by the right eye, the nearest vertical distance between the left eye and the right eye relative to the display screen is determined as the nearest observation position; when the left eye only sees the red image and the right eye only sees the blue image, the furthest vertical distance between the left and right eyes and the display screen is determined as the furthest observation position.

In an alternative embodiment, if each adjacent four columns of sub-pixels uniquely corresponds to one raster unit, and the slits of the raster unit correspond to one column of sub-pixels, the gratings of the raster unit correspond to adjacent three columns of sub-pixels; as shown in fig. 4a and 4b, the embodiment of the present invention may further solve the problem that the binocular positions related to the third and fourth scenes do not fall into the optimal viewing areas by adjusting the image display of the first to fourth columns of sub-pixels corresponding to each raster unit.

For scene three, based on the structural features of the slits of the grating unit corresponding to one column of sub-pixels and the gratings of the grating unit corresponding to three adjacent columns of sub-pixels, step 503 includes the following adjustment methods:

the first adjustment mode is as follows: and if the vertical distance between the two eye positions and the display screen is near the farthest observing distance, controlling the first row of sub-pixels corresponding to each grating unit to display the left eye image, and controlling the second row of sub-pixels corresponding to each grating unit to display the right eye image so as to adjust the movement of the space position of the optimal observing area, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observing area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observing area.

Optionally, if the vertical distance between the binocular position and the display screen is continuously greater than the furthest observation distance, (excluding the case that the vertical distance between the binocular position and the display screen is too far and exceeds the adjustment range of the embodiment of the present invention), the first column of subpixels corresponding to each raster unit are controlled to display the left eye image, the second column of subpixels corresponding to each raster unit are controlled to display the right eye image, the third column of subpixels corresponding to each raster unit are also controlled to display the full black image, and the fourth column of subpixels corresponding to each raster unit are controlled to display the full black image.

The second adjustment mode is as follows: and if the vertical distance between the two eye positions and the display screen is near the farthest observing distance, controlling the second row of sub-pixels corresponding to each grating unit to display the left eye image, and controlling the third row of sub-pixels corresponding to each grating unit to display the right eye image so as to adjust the movement of the space position of the optimal observing area, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observing area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observing area.

Optionally, if the vertical distance between the binocular position and the display screen is continuously greater than the furthest observation distance, (excluding the case that the vertical distance between the binocular position and the display screen is too far and exceeds the adjustment range of the embodiment of the present invention), the second column of subpixels corresponding to each raster unit are controlled to display the left eye image, the third column of subpixels corresponding to each raster unit are controlled to display the right eye image, the first column of subpixels corresponding to each raster unit are also controlled to display the full black image, and the fourth column of subpixels corresponding to each raster unit are controlled to display the full black image.

Third adjustment mode: and if the vertical distance between the two eye positions and the display screen is near the farthest observing distance, controlling the third row of sub-pixels corresponding to each grating unit to display the left eye image, and controlling the fourth row of sub-pixels corresponding to each grating unit to display the right eye image, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observing area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observing area.

Optionally, if the vertical distance between the binocular position and the display screen is continuously greater than the furthest observation distance, (excluding the case that the vertical distance between the binocular position and the display screen is too far and exceeds the adjustment range of the embodiment of the present invention), the third column of subpixels corresponding to each raster unit are controlled to display the left eye image, the fourth column of subpixels corresponding to each raster unit are controlled to display the right eye image, and at the same time, the first column of subpixels corresponding to each raster unit are also controlled to display the full black image, and the second column of subpixels corresponding to each raster unit are controlled to display the full black image.

Fourth adjustment mode: and if the vertical distance between the two eye positions and the display screen is near the farthest observing distance, controlling the fourth row of sub-pixels to display the left eye image, and controlling the first row of sub-pixels to display the right eye image so as to adjust the movement of the space position of the optimal observing area, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observing area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observing area.

Optionally, if the vertical distance between the binocular position and the display screen is continuously greater than the furthest observation distance, (excluding the case that the vertical distance between the binocular position and the display screen is too far and exceeds the adjustment range of the embodiment of the present invention), the fourth column of subpixels corresponding to each raster unit are controlled to display the left eye image, the first column of subpixels corresponding to each raster unit are controlled to display the right eye image, the second column of subpixels corresponding to each raster unit are also controlled to display the full black image, and the third column of subpixels corresponding to each raster unit are controlled to display the full black image.

The four adjustment modes can be recycled, so that the problem that the eyes of an observer move left and right when moving back and forth relative to the display screen is solved.

For scene four, based on the structural features of the slits of the grating unit corresponding to one column of sub-pixels and the gratings of the grating unit corresponding to three adjacent columns of sub-pixels, step 503 includes the following adjustment methods:

the first adjustment mode is as follows: and if the vertical distance between the two eye positions and the display screen is near the nearest observation distance, controlling the first row of sub-pixels corresponding to each grating unit to display a left eye image, and controlling the third row of sub-pixels corresponding to each grating unit to display a right eye image so as to adjust the movement of the spatial position of the optimal observation area, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observation area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observation area.

Optionally, if the vertical distance between the binocular position and the display screen is smaller than the nearest viewing distance (excluding the case that the vertical distance between the binocular position and the display screen is too small and exceeds the adjustment range of the embodiment of the present invention), the first column of subpixels corresponding to each raster unit is controlled to display the left eye image, the third column of subpixels corresponding to each raster unit is controlled to display the right eye image, the second column of subpixels corresponding to each raster unit is also controlled to display the full black image, and the fourth column of subpixels corresponding to each raster unit is controlled to display the full black image.

The second adjustment mode is as follows: and if the vertical distance between the two eye positions and the display screen is near the nearest observation distance, controlling the second row of sub-pixels corresponding to each grating unit to display a left eye image, and controlling the fourth row of sub-pixels corresponding to each grating unit to display a right eye image so as to adjust the movement of the spatial position of the optimal observation area, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observation area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observation area.

Optionally, if the vertical distance between the binocular position and the display screen is smaller than the nearest viewing distance, (excluding the case that the vertical distance between the binocular position and the display screen is too short and exceeds the adjustment range of the embodiment of the present invention), the second column of sub-pixels corresponding to each raster unit is controlled to display the left eye image, the fourth column of sub-pixels corresponding to each raster unit is controlled to display the right eye image, the first column of sub-pixels corresponding to each raster unit is also controlled to display the all black image, and the third column of sub-pixels corresponding to each raster unit is controlled to display the all black image, so as to adjust the movement of the spatial position of the optimal viewing area, so that the left eye position is located in the ideal left viewing area of the adjusted optimal viewing area, and the right eye position is located in the ideal right viewing area of the adjusted optimal viewing area.

Third adjustment mode: and if the vertical distance between the two eye positions and the display screen is near the nearest observation distance, controlling the first row of sub-pixels corresponding to each grating unit to display a right eye image, and controlling the third row of sub-pixels corresponding to each grating unit to display a left eye image so as to adjust the movement of the spatial position of the optimal observation area, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observation area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observation area.

Optionally, if the vertical distance between the binocular position and the display screen is smaller than the nearest viewing distance (excluding the case that the vertical distance between the binocular position and the display screen is too short and exceeds the adjustment range of the embodiment of the present invention), the first column of subpixels corresponding to each raster unit is controlled to display the right eye image, the third column of subpixels corresponding to each raster unit is controlled to display the left eye image, the second column of subpixels corresponding to each raster unit is controlled to display the all black image, and the fourth column of subpixels corresponding to each raster unit is controlled to display the all black image, so as to adjust the movement of the spatial position of the optimal viewing area, so that the left eye position is located in the ideal left viewing area of the adjusted optimal viewing area, and the right eye position is located in the ideal right viewing area of the adjusted optimal viewing area.

Fourth adjustment mode: and if the vertical distance between the two eye positions and the display screen is near the nearest observation distance, controlling the second row of sub-pixels corresponding to each grating unit to display the right eye image, and controlling the fourth row of sub-pixels corresponding to each grating unit to display the left eye image so as to adjust the movement of the space position of the optimal observation area, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observation area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observation area.

Optionally, if the vertical distance between the two eye positions and the display screen is smaller than the nearest viewing distance (excluding the case that the vertical distance between the two eye positions and the display screen is too short and exceeds the adjustment range of the embodiment of the present invention), the second column of sub-pixels corresponding to each raster unit is controlled to display the right eye image, the fourth column of sub-pixels corresponding to each raster unit is controlled to display the left eye image, the first column of sub-pixels corresponding to each raster unit is also controlled to display the full black image, and the third column of sub-pixels corresponding to each raster unit is controlled to display the full black image, so as to adjust the movement of the spatial position of the optimal viewing area, so that the left eye position is located in the ideal left viewing area of the adjusted optimal viewing area, and the right eye position is located in the ideal right viewing area of the adjusted optimal viewing area.

The four adjustment modes can be recycled, so that the problem that the eyes of an observer move left and right when moving back and forth relative to the display screen is solved.

In the above method flow step 503, for the scene where the binocular position does not fall into the optimal observation area and the spatial distance of the binocular position deviated from the optimal observation area is within the adjustment range of the embodiment of the present invention, the overall deviation of the naked eye 3D viewing area is realized by adjusting the image display of the first column of sub-pixels to the fourth column of sub-pixels corresponding to each grating unit, so as to ensure that the binocular position is located in the offset rear optimal observation area after the deviation of the optimal observation area.

In step 202, if it is determined that the binocular position does not fall into the optimal viewing area and the vertical distance between the binocular position and the display screen is too far or too close, which exceeds the adjustable range of the embodiment of the present invention, the method further includes, before step 503:

and displaying second prompt information, wherein the second prompt information is used for prompting an observer to adjust the spatial positions of the left eye and the right eye relative to the display screen so as to enable the spatial distance of the positions of the two eyes deviating from the optimal observation area to be in an adjustable range.

After the observer moves the positions of the eyes and adjusts the spatial positions of the left and right eyes with respect to the display screen, the spatial distance of the positions of the eyes from the optimal observation area is within an adjustable range, and step 503 may be performed according to several scene examples in the above-described embodiments.

In the embodiment of the present invention, the adjustable range of the whole naked eye 3D viewing area (including the optimal viewing area) may determine the appropriate threshold according to the simulated binocular positions and the adjustment ranges of all the adjustment schemes of the above embodiment.

Optionally, in the step 202, if it is determined that the binocular positions do not fall into the optimal observation area and the spatial distance of the binocular positions deviating from the optimal observation area is too far or too close, which exceeds the adjustable range of the embodiment of the present invention, the method further includes: and switching the 3D image displayed by the display screen into a 2D image.

Based on the above method flow, the embodiment of the invention also provides naked eye 3D display equipment, which is used for executing the above method flow.

A naked eye 3D display device as shown in fig. 7, comprising:

a display screen 100 comprising a plurality of rows and columns of pixels;

the grating structure 200 comprises a plurality of grating units which are sequentially arranged, wherein each grating unit comprises a grating and a slit which are adjacently arranged; at least four adjacent rows of pixels uniquely correspond to one raster unit;

the eye tracker 300 is configured to obtain the positions of eyes of an observer facing the display screen 100, where the positions of eyes are spatial positions of eyes relative to the display screen 100; judging whether the positions of the eyes fall into an optimal observation area of the naked eye 3D visual area, wherein the optimal observation area comprises an ideal left visual area and an ideal right visual area which belong to a pupil distance range;

The image processor 400 is configured to adjust the image display of the row of pixels corresponding to each raster unit to adjust the spatial position of the optimal viewing area when the eye tracker 300 determines that the binocular position does not fall within the optimal viewing area.

The grating structure 200 is located between the display screen 100 and the backlight 500, and there is a correspondence between a plurality of rows of pixels of the display screen 100 and a plurality of grating units of the grating structure 200, so that in order to realize that the spatial positions of the whole naked eye 3D viewing area and the optimal viewing area of the naked eye 3D viewing area move along with the change of image display, at least every four adjacent rows of pixels of the display screen 100 uniquely correspond to one grating unit, and one grating and one slit respectively correspond to at least two rows of pixels.

In a preferred embodiment, each adjacent four rows of pixels uniquely corresponds to one raster unit; if every adjacent four rows of pixels sequentially comprise a first row of pixels, a second row of pixels, a third row of pixels and a fourth row of pixels.

As shown in fig. 9, one raster unit includes one raster and one slit, each raster unit corresponds to 4 rows of pixels, for example, 1 st raster unit corresponds to 1 st to 4 th rows of sub-pixels; the 2 nd grating unit corresponds to the 5 th to 8 th rows of sub-pixels; and so on. Each row of pixels includes a plurality of pixel units, each pixel unit including a sub-pixel R, a sub-pixel G, and a sub-pixel B.

Based on the above preferred example, the image processor 400 is further configured to: before the eye tracker 300 acquires the positions of the eyes of the observer facing the display screen 100, controlling the first row of pixels and the second row of pixels corresponding to each raster unit to display a left eye image, and controlling the third row of pixels and the fourth row of pixels corresponding to each raster unit to display a right eye image;

the eye tracker 300 is also used to: before the positions of eyes of an observer facing the display screen 100 are obtained, determining the spatial position of a naked eye 3D visual area according to image display of row pixels corresponding to each grating unit, wherein the naked eye 3D visual area comprises a left visual area, a right visual area and a crosstalk area; and determining an optimal observation area of the naked eye 3D visual area according to the spatial position of the naked eye 3D visual area.

The optimal viewing area of the naked eye 3D viewing zone determined by the eye tracker 300 in the above manner refers to a viewing area including an ideal left viewing zone and an ideal right viewing zone that belong to a pupil distance range, and when the left eye position is in the ideal left viewing zone and the right eye position is in the ideal right viewing zone, the left and right eyes have no crosstalk, so that the optimal 3D display effect can be observed, and typically the optimal viewing area corresponds to the central area of the display screen 100.

In a preferred embodiment, the naked eye 3D viewing area conforming to the pupil distance characteristics of the two eyes of different observers can be calibrated according to different observers, and the method is specifically referred to an embodiment of the method.

Based on the optimal viewing area of the naked eye 3D viewing zone determined by the eye tracker 300 in the manner described above, the image processor 400 is specifically configured to: if the eye tracker 300 determines that the left eye position does not fall into the ideal left viewing zone and the right eye position does not fall into the ideal right viewing zone, the image display of the first to fourth rows of pixels corresponding to each raster unit is adjusted.

The eye tracker 300 determines that the left eye position does not fall within the ideal left view region of the optimal viewing area and the right eye position does not fall within the ideal right view region of the optimal viewing area, comprising two scenarios:

the first scene, the left eye position and the right eye position are respectively positioned at the left half pupil distance of the ideal left visual zone and the ideal right visual zone;

and in a second scene, the left eye position and the right eye position are respectively positioned at the left ideal viewing zone and the right ideal viewing zone by half a pupil distance to the right.

For scenario one, the image processor 400 is specifically configured to:

the first row of pixels corresponding to each raster unit is controlled to display a left eye image, the second row of pixels and the third row of pixels display a right eye image, and the fourth row of pixels display a left eye image so as to shift the optimal viewing area to the left by half a pupil distance. Through the adjustment of the display images from the first row of pixels to the fourth row of pixels corresponding to each grating unit, after the spatial position of the optimal observation area is shifted leftwards by half a pupil distance, the left eye position is positioned in an ideal left visual area of the adjusted optimal observation area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observation area.

For scenario two, the image processor 400 is specifically configured to: the first row of pixels corresponding to each raster unit is controlled to display a right eye image, the second row of pixels and the third row of pixels display a left eye image, and the fourth row of pixels display a right eye image so as to shift the optimal viewing area by half a pupil distance to the right.

Through the adjustment of the display images from the first row of pixels to the fourth row of pixels corresponding to each grating unit, after the spatial position of the optimal observation area is shifted leftwards by half a pupil distance, the left eye position is positioned in an ideal left visual area of the adjusted optimal observation area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observation area.

For a first scene and a second scene, each four adjacent rows of pixels uniquely correspond to one grating unit, the slits of the grating units correspond to one row of pixels, and the gratings of the grating units correspond to three adjacent rows of pixels; alternatively, each four adjacent rows of pixels uniquely corresponds to one raster unit, the slits of the raster units correspond to two adjacent rows of pixels, and the rasters of the raster units correspond to two other adjacent rows of pixels.

An observer-facing display screen offset back and forth along an optimal viewing area, resulting in a left eye position that does not fall within an ideal left view region of the optimal viewing area and a right eye position that does not fall within an ideal right view region of the optimal viewing area, comprising:

The third scene is that the vertical distance between the two eyes and the display screen is longer, the vertical distance between the two eyes and the display screen is not smaller than the furthest observation distance, and the furthest observation distance is the furthest vertical distance between the two eyes and the display screen when an observer is positioned in the optimal observation area;

and when the vertical distance between the two eyes and the display screen is smaller, the vertical distance between the two eyes and the display screen is not larger than the nearest observation distance, and the nearest observation distance is the nearest vertical distance between the two eyes and the display screen when the observer is positioned in the optimal observation area.

The closest and farthest viewing distances may be determined as follows:

a left-eye correction image for correcting an optimal observation position of the observer, which is a red image, and a right-eye correction image, which is a blue image, are displayed. When the correction is carried out, the left eye and the right eye are alternately closed, so that the observer moves the positions of the two eyes until the left eye is closed, the right eye only observes the mainly blue image, the observed red image has the lowest brightness, and when the observer closes the right eye, the left eye mainly observes the red image and the blue image to have the lowest brightness, and the optimal observation position is obtained at the moment. Based on the above, the observer is prompted to move forwards or backwards towards the display screen, the observer alternately closes the left eye and the right eye, only the red image is seen by the left eye, and when only the blue image is seen by the right eye, the nearest vertical distance between the left eye and the right eye relative to the display screen is determined as the nearest observation position; when the left eye only sees the red image and the right eye only sees the blue image, the furthest vertical distance between the left and right eyes and the display screen is determined as the furthest observation position.

In an alternative embodiment, if each adjacent four rows of pixels uniquely corresponds to one raster unit, and the slits of the raster unit correspond to one row of pixels, the raster of the raster unit corresponds to three adjacent rows of pixels; as shown in fig. 4a and 4b, the embodiment of the present invention can also solve the problem that the binocular positions related to the third and fourth scenes do not fall into the optimal viewing areas by adjusting the image display of the first to fourth rows of pixels corresponding to each raster unit.

For scene three, if the vertical distance between the binocular position and the display screen is near the furthest viewing distance, the image processor 400 is specifically configured to:

controlling the first row of pixels corresponding to each raster unit to display a left eye image, and controlling the second row of pixels corresponding to each raster unit to display a right eye image; or,

controlling the second row of pixels corresponding to each raster unit to display a left eye image, and controlling the third row of pixels corresponding to each raster unit to display a right eye image; or,

and controlling the third row of pixels corresponding to each grating unit to display a left eye image, and controlling the fourth row of pixels corresponding to each grating unit to display a right eye image so as to adjust the movement of the spatial position of the optimal observation area, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observation area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observation area.

Alternatively, if the vertical distance between the binocular position and the display screen is continuously greater than the furthest viewing distance (excluding the case that the vertical distance between the binocular position and the display screen is too far, beyond the adjustment range of the embodiment of the present invention), the image processor 400 is specifically configured to:

controlling the first row of pixels corresponding to each raster unit to display a left eye image, controlling the second row of pixels corresponding to each raster unit to display a right eye image, and simultaneously controlling the third row of pixels corresponding to each raster unit to display a full black image and controlling the fourth row of pixels corresponding to each raster unit to display a full black image; or,

controlling the second row of pixels corresponding to each raster unit to display a left eye image, controlling the third row of pixels corresponding to each raster unit to display a right eye image, and simultaneously controlling the first row of pixels corresponding to each raster unit to display a full black image and controlling the fourth row of pixels corresponding to each raster unit to display a full black image; or,

the third row of pixels corresponding to each raster unit is controlled to display a left eye image, the fourth row of pixels corresponding to each raster unit is controlled to display a right eye image, and meanwhile, the first row of pixels corresponding to each raster unit is controlled to display a full black image, and the second row of pixels corresponding to each raster unit is controlled to display a full black image; or,

The fourth row of pixels corresponding to each raster unit is controlled to display the left eye image, the first row of pixels corresponding to each raster unit is controlled to display the right eye image, the second row of pixels corresponding to each raster unit is also controlled to display the full black image, and the third row of pixels corresponding to each raster unit is controlled to display the full black image.

The four adjustment modes can be recycled, so that the problem that the eyes of an observer move left and right when moving back and forth relative to the display screen is solved.

For scene four, if the vertical distance between the binocular position and the display screen is near the nearest viewing distance, the image processor 400 is specifically configured to:

controlling the first row of pixels corresponding to each raster unit to display a left eye image, and controlling the third row of pixels corresponding to each raster unit to display a right eye image; or,

controlling the second row of pixels corresponding to each raster unit to display a left eye image, and controlling the fourth row of pixels corresponding to each raster unit to display a right eye image; or,

controlling the first row of pixels corresponding to each raster unit to display a right-eye image, and controlling the third row of pixels corresponding to each raster unit to display a left-eye image;

and controlling the second row of pixels corresponding to each raster unit to display a right eye image, and controlling the fourth row of pixels corresponding to each raster unit to display a left eye image so as to adjust the movement of the spatial position of the optimal observation area, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observation area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observation area.

Alternatively, if the vertical distance between the binocular position and the display screen is smaller than the nearest viewing distance (excluding the case that the vertical distance between the binocular position and the display screen is too small, exceeding the adjustment range of the embodiment of the present invention), the image processor 400 is specifically configured to:

controlling the first row of pixels corresponding to each raster unit to display a left eye image, controlling the third row of pixels corresponding to each raster unit to display a right eye image, and simultaneously controlling the second row of pixels corresponding to each raster unit to display a full black image and controlling the fourth row of pixels corresponding to each raster unit to display a full black image; or,

controlling the second row of pixels corresponding to each raster unit to display a left eye image, controlling the fourth row of pixels corresponding to each raster unit to display a right eye image, and simultaneously controlling the first row of pixels corresponding to each raster unit to display a full black image and controlling the third row of pixels corresponding to each raster unit to display a full black image; or,

controlling the first row of pixels corresponding to each raster unit to display a right eye image, controlling the third row of pixels corresponding to each raster unit to display a left eye image, and simultaneously controlling the second row of pixels corresponding to each raster unit to display a full black image and controlling the fourth row of pixels corresponding to each raster unit to display a full black image; or,

The second row of pixels corresponding to each raster unit is controlled to display the right eye image, the fourth row of pixels corresponding to each raster unit is controlled to display the left eye image, and meanwhile, the first row of pixels corresponding to each raster unit is controlled to display the full black image, and the third row of pixels corresponding to each raster unit is controlled to display the full black image. Or,

the four adjustment modes can be recycled, so that the problem that the eyes of an observer move left and right when moving back and forth relative to the display screen is solved.

In the above embodiment, for the scene where the binocular position does not fall into the optimal observation area and the spatial distance of the binocular position deviated from the optimal observation area is within the adjustment range of the embodiment of the present invention, the overall deviation of the naked eye 3D viewing area is achieved by adjusting the image display from the first row of pixels to the fourth row of pixels corresponding to each raster unit, so as to ensure that the binocular position is located in the offset posterior optimal observation area after the deviation of the optimal observation area.

If the eye tracker 300 determines that the positions of the eyes do not fall into the optimal observation area, and the vertical distance between the positions of the eyes and the display screen is too far or too close, beyond the adjustable range of the embodiment of the present invention, the display screen 100 is further configured to display second prompting information, where the second prompting information is used to prompt the observer to adjust the spatial positions of the left eye and the right eye relative to the display screen 100, so that the observer moves the positions of the eyes, and after the spatial positions of the left eye and the right eye relative to the display screen are adjusted, the spatial distance between the positions of the eyes and the optimal observation area is within the adjustable range.

In the embodiment of the present invention, the adjustable range of the whole naked eye 3D viewing area (including the optimal viewing area) may determine the appropriate threshold according to the simulated binocular positions and the adjustment ranges of all the adjustment schemes of the above embodiment.

Alternatively, if the eye tracker 300 determines that the binocular positions do not fall within the optimal viewing area and the spatial distance of the binocular positions from the optimal viewing area is too far or too close, beyond the adjustable range of the embodiments of the present invention, the image processor 400 is further configured to: and switching the 3D image displayed by the display screen into a 2D image.

Based on the same inventive concept, an embodiment of the present invention provides a naked eye 3D display device as shown in fig. 8, including:

a display screen 100 comprising a plurality of rows and columns of pixels, each column of pixels comprising three columns of subpixels;

the grating structure 600 includes a plurality of grating units arranged in sequence, each grating unit including a grating and a slit arranged adjacently; at least every adjacent four columns of sub-pixels uniquely correspond to one grating unit;

the eye tracker 300 is configured to obtain the positions of eyes of an observer facing the display screen 100, where the positions of eyes are spatial positions of eyes relative to the display screen 100; judging whether the positions of the eyes fall into an optimal observation area of the naked eye 3D visual area, wherein the optimal observation area comprises an ideal left visual area and an ideal right visual area which belong to a pupil distance range;

The image processor 400 is configured to adjust the image display of the column sub-pixel corresponding to each raster unit to adjust the spatial position of the optimal viewing area when the eye tracker 300 determines that the binocular position does not fall into the optimal viewing area.

The grating structure 600 is located between the display screen 100 and the backlight 500, where a plurality of columns of sub-pixels of the display screen 100 and a plurality of grating units of the grating structure 600 have a corresponding relationship, so that in order to realize that the spatial positions of the whole naked eye 3D viewing area and the optimal viewing area of the naked eye 3D viewing area move along with the change of image display, at least every four adjacent columns of sub-pixels of the display screen 100 uniquely correspond to one grating unit.

In a preferred embodiment, each adjacent four columns of sub-pixels uniquely corresponds to one raster unit; each four adjacent columns of sub-pixels sequentially comprise a first column of sub-pixels, a second column of sub-pixels, a third column of sub-pixels and a fourth column of sub-pixels. As shown in fig. 10, one grating unit includes one grating and one slit, and each grating unit corresponds to 4 columns of sub-pixels, for example, 4 columns of sub-pixels corresponding to the 1 st grating unit are: a first column of sub-pixels R, a second column of sub-pixels G, a third column of sub-pixels B and a fourth column of sub-pixels R. The 4 columns of subpixels corresponding to the 2 nd raster unit are: a first column of sub-pixels G, a second column of sub-pixels B, a third column of sub-pixels R and a fourth column of sub-pixels G. By analogy, the 4 columns of sub-pixels corresponding to the 3 rd raster unit are: a first column of sub-pixels B, a second column of sub-pixels R, a third column of sub-pixels G and a fourth column of sub-pixels B.

Based on the above preferred example, the image processor 400 is further configured to: before the eye tracker 300 acquires the positions of the eyes of the observer facing the display screen 100, controlling the first column of sub-pixels and the second column of sub-pixels corresponding to each raster unit to display a left eye image, and controlling the third column of sub-pixels and the fourth column of sub-pixels corresponding to each raster unit to display a right eye image;

the eye tracker 300 is also used to: before the positions of eyes of an observer facing the display screen 100 are obtained, determining the spatial position of a naked eye 3D visual area according to the image display of the column sub-pixels corresponding to each grating unit, wherein the naked eye 3D visual area comprises a left visual area, a right visual area and a crosstalk area; and determining the optimal observation area of the naked eye 3D visual area according to the spatial position of the naked eye 3D visual area.

The optimal viewing area of the naked eye 3D viewing zone determined by the eye tracker 300 in the above manner refers to a viewing area including an ideal left viewing zone and an ideal right viewing zone that belong to a pupil distance range, and when the left eye position is in the ideal left viewing zone and the right eye position is in the ideal right viewing zone, the left and right eyes have no crosstalk, so that the optimal 3D display effect can be observed, and typically the optimal viewing area corresponds to the central area of the display screen 100.

In a preferred embodiment, the naked eye 3D viewing zone conforming to the interpupillary distance characteristics of the two eyes of different observers can be calibrated. See in particular the above embodiments.

Based on the optimal viewing area of the naked eye 3D viewing zone determined by the eye tracker 300 in the manner described above, the image processor 400 is specifically configured to:

if the eye tracker 300 determines that the left eye position does not fall into the ideal left viewing zone and the right eye position does not fall into the ideal right viewing zone, the image display of the first to fourth columns of sub-pixels corresponding to each raster unit is adjusted.

The eye tracker 300 determines that the left eye position does not fall within the ideal left view region of the optimal viewing area, and that the right eye position does not fall within the ideal right view region of the optimal viewing area, including the viewer shifting left and right along the optimal viewing area toward the display screen, or the viewer shifting back and forth toward the display screen.

The observer shifts left and right along the optimal viewing area towards the display screen, resulting in a left eye position that does not fall into the ideal left view region of the optimal viewing area, and a right eye position that does not fall into the ideal right view region of the optimal viewing area, comprising two scenarios:

the first scene, the left eye position and the right eye position are respectively positioned at the left half pupil distance of the ideal left visual zone and the ideal right visual zone;

And in a second scene, the left eye position and the right eye position are respectively positioned at the left ideal viewing zone and the right ideal viewing zone by half a pupil distance to the right.

For scenario one, the image processor 400 is specifically configured to: the first column of subpixels are controlled to display a left eye image, the second column of subpixels and the third column of subpixels display a right eye image, and the fourth column of subpixels display a left eye image to shift the optimal viewing area half a pupil distance to the left. Through the adjustment of the display images from the first row of sub-pixels to the fourth row of sub-pixels corresponding to each grating unit, the spatial position of the optimal observation area is shifted leftwards by half a pupil distance, the left eye position is located in an ideal left visual area of the adjusted optimal observation area, and the right eye position is located in an ideal right visual area of the adjusted optimal observation area.

For scenario two, the image processor 400 is specifically configured to: the first column of subpixels are controlled to display a right eye image, the second column of subpixels and the third column of subpixels display a left eye image, and the fourth column of subpixels display a right eye image to shift the best viewing area to the right by half a pupil distance. Through the adjustment of the display images from the first row of sub-pixels to the fourth row of sub-pixels corresponding to each grating unit, the spatial position of the optimal observation area is shifted leftwards by half a pupil distance, the left eye position is located in an ideal left visual area of the adjusted optimal observation area, and the right eye position is located in an ideal right visual area of the adjusted optimal observation area.

For a first scene and a second scene, each four adjacent rows of pixels uniquely correspond to one grating unit, the slits of the grating units correspond to one row of pixels, and the gratings of the grating units correspond to three adjacent rows of pixels; alternatively, each four adjacent rows of pixels uniquely corresponds to one raster unit, the slits of the raster units correspond to two adjacent rows of pixels, and the rasters of the raster units correspond to two other adjacent rows of pixels.

In addition to the above two scenes, if the eye tracker 300 determines that the binocular positions do not fall within the optimal viewing area, it may further include:

an observer-facing display screen offset back and forth along an optimal viewing area, resulting in a left eye position that does not fall within an ideal left view region of the optimal viewing area and a right eye position that does not fall within an ideal right view region of the optimal viewing area, comprising:

the third scene is that the vertical distance between the two eyes and the display screen is longer, the vertical distance between the two eyes and the display screen is not smaller than the furthest observation distance, and the furthest observation distance is the furthest vertical distance between the two eyes and the display screen when an observer is positioned in the optimal observation area;

and when the vertical distance between the two eyes and the display screen is smaller, the vertical distance between the two eyes and the display screen is not larger than the nearest observation distance, and the nearest observation distance is the nearest vertical distance between the two eyes and the display screen when the observer is positioned in the optimal observation area.

The closest and farthest viewing distances are specifically referred to the above embodiments.

For scene three, if the vertical distance between the binocular position and the display screen is near the furthest viewing distance, the image processor 400 is specifically configured to:

controlling a first column of sub-pixels corresponding to each raster unit to display a left eye image, and controlling a second column of sub-pixels corresponding to each raster unit to display a right eye image; or,

the second column of subpixels corresponding to each raster unit is controlled to display a left eye image, and the third column of subpixels corresponding to each raster unit is controlled to display a right eye image, or,

the third column of subpixels corresponding to each raster unit is controlled to display a left eye image, and the fourth column of subpixels corresponding to each raster unit is controlled to display a right eye image, or,

the fourth column of subpixels corresponding to each raster unit is controlled to display a left eye image, and the first column of subpixels corresponding to each raster unit is controlled to display a right eye image, so as to adjust the movement of the spatial position of the optimal observation area.

The four adjustment modes can be recycled, so that the problem that the eyes of an observer move left and right when moving back and forth relative to the display screen is solved.

Alternatively, if the vertical distance between the binocular position and the display screen is continuously greater than the furthest viewing distance (excluding the case that the vertical distance between the binocular position and the display screen is too far, beyond the adjustment range of the embodiment of the present invention), the image processor 400 is specifically configured to:

Controlling a first column of sub-pixels corresponding to each raster unit to display a left eye image, controlling a second column of sub-pixels corresponding to each raster unit to display a right eye image, and simultaneously controlling a third column of sub-pixels corresponding to each raster unit to display a full black image and controlling a fourth column of sub-pixels corresponding to each raster unit to display a full black image; or,

controlling the second column of sub-pixels corresponding to each raster unit to display a left eye image, controlling the first column of sub-pixels corresponding to each raster unit to display a full black image, and controlling the fourth column of sub-pixels corresponding to each raster unit to display a full black image; or,

controlling a third column of sub-pixels corresponding to each raster unit to display a left eye image, controlling a fourth column of sub-pixels corresponding to each raster unit to display a right eye image, and simultaneously controlling a first column of sub-pixels corresponding to each raster unit to display a full black image and controlling a second column of sub-pixels corresponding to each raster unit to display a full black image; or,

the fourth column of sub-pixels corresponding to each raster unit is controlled to display the left eye image, the first column of sub-pixels corresponding to each raster unit is controlled to display the right eye image, the second column of sub-pixels corresponding to each raster unit is also controlled to display the full black image, and the third column of sub-pixels corresponding to each raster unit is controlled to display the full black image.

For scene four, if the vertical distance between the binocular position and the display screen is near the nearest viewing distance, the image processor 400 is specifically configured to:

controlling a first column of sub-pixels corresponding to each raster unit to display a left eye image, and controlling a third column of sub-pixels corresponding to each raster unit to display a right eye image; or,

controlling a second column of sub-pixels corresponding to each raster unit to display a left eye image, and controlling a fourth column of sub-pixels corresponding to each raster unit to display a right eye image; or,

controlling a first column of sub-pixels corresponding to each raster unit to display a right-eye image, and controlling a third column of sub-pixels corresponding to each raster unit to display a left-eye image;

and controlling the second row of sub-pixels corresponding to each grating unit to display the right eye image, and controlling the fourth row of sub-pixels corresponding to each grating unit to display the left eye image so as to adjust the movement of the spatial position of the optimal observation area, so that the left eye position is positioned in an ideal left visual area of the adjusted optimal observation area, and the right eye position is positioned in an ideal right visual area of the adjusted optimal observation area.

The four adjustment modes can be recycled, so that the problem that the eyes of an observer move left and right when moving back and forth relative to the display screen is solved.

Alternatively, if the vertical distance between the binocular position and the display screen is smaller than the nearest viewing distance (excluding the case that the vertical distance between the binocular position and the display screen is too small, exceeding the adjustment range of the embodiment of the present invention), the image processor 400 is specifically configured to:

controlling a first column of sub-pixels corresponding to each raster unit to display a left eye image, controlling a third column of sub-pixels corresponding to each raster unit to display a right eye image, and simultaneously controlling a second column of sub-pixels corresponding to each raster unit to display a full black image and controlling a fourth column of sub-pixels corresponding to each raster unit to display a full black image; or,

controlling the second column of sub-pixels corresponding to each raster unit to display a left eye image, controlling the first column of sub-pixels corresponding to each raster unit to display a full black image, and controlling the third column of sub-pixels corresponding to each raster unit to display a full black image; or,

controlling a first column of sub-pixels corresponding to each raster unit to display a right eye image, controlling a third column of sub-pixels corresponding to each raster unit to display a left eye image, and simultaneously controlling a second column of sub-pixels corresponding to each raster unit to display a full black image and controlling a fourth column of sub-pixels corresponding to each raster unit to display a full black image; or,

The second column of sub-pixels corresponding to each raster unit is controlled to display the right eye image, the fourth column of sub-pixels corresponding to each raster unit is controlled to display the left eye image, and the first column of sub-pixels corresponding to each raster unit is also controlled to display the full black image, and the third column of sub-pixels corresponding to each raster unit is controlled to display the full black image.

In the above embodiment, for the scene where the binocular position does not fall into the optimal observation area and the spatial distance of the binocular position deviated from the optimal observation area is within the adjustment range of the embodiment of the present invention, the overall deviation of the naked eye 3D viewing area is achieved by adjusting the image display of the first column of sub-pixels to the fourth column of sub-pixels corresponding to each raster unit, so as to ensure that the binocular position is located in the deviated forehead optimal observation area after the deviation of the optimal observation area.

If the eye tracker 300 determines that the binocular position does not fall within the optimal viewing area and the vertical distance of the binocular position from the display screen is too far or too close beyond the adjustable range of an embodiment of the present invention, the display screen 100 is further configured to:

and displaying second prompt information, wherein the second prompt information is used for prompting an observer to adjust the spatial positions of the left eye and the right eye relative to the display screen so that the observer can move the positions of the two eyes, and the spatial distance of the two eyes deviating from the optimal observation area is in an adjustable range after the spatial positions of the left eye and the right eye relative to the display screen are adjusted.

In the embodiment of the present invention, the adjustable range of the whole naked eye 3D viewing area (including the optimal viewing area) may determine the appropriate threshold according to the simulated binocular positions and the adjustment ranges of all the adjustment schemes of the above embodiment.

Alternatively, if the eye tracker 300 determines that the binocular positions do not fall within the optimal viewing area and the spatial distance of the binocular positions from the optimal viewing area is too far or too close, beyond the adjustable range of the embodiments of the present invention, the image processor 400 is further configured to: and switching the 3D image displayed by the display screen into a 2D image.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (20)

1. The display method of the naked eye 3D display device is characterized in that a display screen of the naked eye 3D display device comprises a plurality of rows and a plurality of columns of pixels; the grating structure of the naked eye 3D display device comprises a plurality of grating units which are sequentially arranged; at least one raster unit for each adjacent four rows of pixels, the method comprising:

acquiring the positions of two eyes of an observer when facing a display screen, wherein the positions of the two eyes are the spatial positions of the two eyes relative to the display screen;

judging whether the binocular positions fall into an optimal observation area of a naked eye 3D visual area or not, wherein the optimal observation area comprises an ideal left visual area and an ideal right visual area which belong to a pupil distance range;

if the left eye position does not fall into the ideal left visual area, the right eye position does not fall into the ideal right visual area, and the vertical distance between the two eye positions and the display screen is not smaller than the furthest observation distance or not larger than the closest observation distance, adjusting the image display of the row of pixels corresponding to each grating unit so as to adjust the space position of the optimal observation area;

the furthest observation distance is the furthest vertical distance between the binocular position and the display screen when the observer is positioned in the optimal observation area, and the closest observation distance is the closest vertical distance between the binocular position and the display screen when the observer is positioned in the optimal observation area.

2. The display method according to claim 1, wherein each of the grating units includes one grating and one slit adjacently disposed, each of the adjacent four rows of pixels uniquely corresponding to one grating unit; if every adjacent four rows of pixels sequentially comprise a first row of pixels, a second row of pixels, a third row of pixels and a fourth row of pixels;

before acquiring the binocular position of the observer when facing the display screen, the method further comprises:

controlling the first row of pixels and the second row of pixels corresponding to each raster unit to display a left eye image, and controlling the third row of pixels and the fourth row of pixels corresponding to each raster unit to display a right eye image;

determining the space position of the naked eye 3D visual area according to the image display of the row pixels corresponding to each grating unit, wherein the naked eye 3D visual area comprises a left visual area, a right visual area and a crosstalk area;

and determining an optimal observation area of the naked eye 3D visual area according to the space position of the naked eye 3D visual area.

3. The display method of claim 2, wherein the method further comprises:

if the left eye position and the right eye position are respectively positioned at the left half pupil distance of the ideal left visual area and the ideal right visual area, controlling the first row of pixels to display left eye images, the second row of pixels and the third row of pixels to display right eye images, and the fourth row of pixels to display left eye images so as to shift the optimal observation area leftwards by half pupil distance;

And if the left eye position and the right eye position are respectively positioned at the ideal left visual area and the ideal right visual area and are deviated by half of the pupil distance to the right, controlling the first row of pixels to display a right eye image, the second row of pixels and the third row of pixels to display a left eye image, and the fourth row of pixels to display a right eye image so as to shift the optimal observation area to the right by half of the pupil distance.

4. A display method according to claim 2, wherein each adjacent four rows of pixels uniquely corresponds to a raster unit, in particular: the slits of the grating units correspond to one row of pixels, and the gratings of the grating units correspond to three adjacent rows of pixels;

when the left eye position does not fall into the ideal left visual area, the right eye position does not fall into the ideal right visual area, and the vertical distance between the two eye positions and the display screen is not smaller than the furthest observation distance, adjusting the image display of the row of pixels corresponding to each grating unit, including:

controlling the first row of pixels to display a left eye image and the second row of pixels to display a right eye image; or,

controlling the second row of pixels to display a left eye image and the third row of pixels to display a right eye image; or,

controlling the third row of pixels to display a left eye image, and controlling the fourth row of pixels to display a right eye image; or,

And controlling the fourth row of pixels to display a left eye image, and controlling the first row of pixels to display a right eye image.

5. A display method according to claim 2, wherein each adjacent four rows of pixels uniquely corresponds to a raster unit, in particular: the slits of the grating units correspond to one row of pixels, and the gratings of the grating units correspond to three adjacent rows of pixels;

when the left eye position does not fall into the ideal left visual area, the right eye position does not fall into the ideal right visual area, and the vertical distance between the two eye positions and the display screen is not greater than the nearest observation distance, adjusting the image display of the row of pixels corresponding to each raster unit, including:

controlling the first row of pixels to display a left eye image, and the third row of pixels to display a right eye image; or,

controlling the second row of pixels to display a left eye image, and controlling the fourth row of pixels to display a right eye image; or,

controlling the first row of pixels to display a right eye image, and controlling the third row of pixels to display a left eye image; or,

and controlling the second row of pixels to display a right eye image, and controlling the fourth row of pixels to display a left eye image.

6. The display method of the naked eye 3D display device is characterized in that a display screen of the naked eye 3D display device comprises a plurality of rows and columns of pixels, and each column of pixels comprises three columns of sub-pixels; the grating structure of the naked eye 3D display device comprises a plurality of grating units which are sequentially arranged, and at least every four adjacent columns of sub-pixels uniquely correspond to one grating unit; the method comprises the following steps:

Acquiring the positions of two eyes of an observer when facing a display screen, wherein the positions of the two eyes are the spatial positions of the two eyes relative to the display screen;

judging whether the binocular positions fall into an optimal observation area of a naked eye 3D visual area or not, wherein the optimal observation area comprises an ideal left visual area and an ideal right visual area which belong to a pupil distance range;

if the left eye position does not fall into the ideal left visual area, the right eye position does not fall into the ideal right visual area, and the vertical distance between the two eye positions and the display screen is not smaller than the furthest observation distance or not larger than the closest observation distance, adjusting the image display of the column sub-pixels corresponding to each grating unit so as to adjust the space position of the optimal observation area;

the furthest observation distance is the furthest vertical distance between the binocular position and the display screen when the observer is positioned in the optimal observation area, and the closest observation distance is the closest vertical distance between the binocular position and the display screen when the observer is positioned in the optimal observation area.

7. The display method of claim 6, wherein each of the grating units includes one grating and one slit adjacently disposed; each adjacent four columns of sub-pixels uniquely corresponds to one grating unit; if every four adjacent rows of sub-pixels sequentially comprise a first row of sub-pixels, a second row of sub-pixels, a third row of sub-pixels and a fourth row of sub-pixels;

Before acquiring the binocular position of the observer when facing the display screen, the method further comprises:

controlling the first and second columns of subpixels corresponding to each raster unit to display a left-eye image, and controlling the third and fourth columns of subpixels corresponding to each raster unit to display a right-eye image;

determining the space position of the naked eye 3D visual area according to the image display of the column sub-pixels corresponding to each grating unit, wherein the naked eye 3D visual area comprises a left visual area, a right visual area and a crosstalk area;

and determining an optimal observation area of the naked eye 3D visual area according to the space position of the naked eye 3D visual area.

8. The display method of claim 7, wherein the method further comprises:

if the left eye position and the right eye position are respectively positioned at the left half pupil distance of the ideal left visual area and the ideal right visual area, controlling the first row of sub-pixels to display left eye images, the second row of sub-pixels and the third row of sub-pixels to display right eye images, and the fourth row of sub-pixels to display left eye images so as to shift the optimal observation area leftwards by half pupil distance;

and if the left eye position and the right eye position are respectively positioned at the ideal left visual area and the ideal right visual area and are deviated by half of the right pupil distance, controlling the first row of sub-pixels to display the right eye image, the second row of sub-pixels and the third row of sub-pixels to display the left eye image, and the fourth row of sub-pixels to display the right eye image so as to shift the optimal observation area to the right by half of the pupil distance.

9. The display method according to claim 7, wherein each adjacent four columns of sub-pixels uniquely corresponds to one raster unit, specifically: the slits of the grating units correspond to one column of sub-pixels, and the gratings of the grating units correspond to three adjacent columns of sub-pixels;

when the left eye position does not fall into the ideal left visual area, the right eye position does not fall into the ideal right visual area, and the vertical distance between the two eye positions and the display screen is not smaller than the furthest observation distance, adjusting the image display of the column sub-pixels corresponding to each grating unit, including:

controlling the first column of subpixels to display a left eye image, and controlling the second column of subpixels to display a right eye image; or,

controlling the second column of subpixels to display a left eye image, and controlling the third column of subpixels to display a right eye image; or,

controlling the third column of subpixels to display a left eye image, and controlling the fourth column of subpixels to display a right eye image; or,

and controlling the fourth column of subpixels to display a left eye image, and controlling the first column of subpixels to display a right eye image.

10. The display method according to claim 7, wherein,

each adjacent four rows of pixels uniquely corresponds to one grating unit, and specifically comprises the following steps: the slits of the grating units correspond to one column of sub-pixels, and the gratings of the grating units correspond to three adjacent columns of sub-pixels;

When the left eye position does not fall into the ideal left visual area, the right eye position does not fall into the ideal right visual area, and the vertical distance between the two eye positions and the display screen is not greater than the nearest observation distance, adjusting the image display of the column sub-pixels corresponding to each grating unit, including:

controlling the first column of subpixels to display a left eye image, and the third column of subpixels to display a right eye image; or,

controlling the second column of sub-pixels to display a left eye image, and controlling the fourth column of sub-pixels to display a right eye image; or,

controlling the first column of subpixels to display a right-eye image, and controlling the third column of subpixels to display a left-eye image; or,

and controlling the second column of subpixels to display a right-eye image, and controlling the fourth column of subpixels to display a left-eye image.

11. A naked eye 3D display device, comprising:

a display screen including a plurality of rows and columns of pixels;

the grating structure comprises a plurality of grating units which are sequentially arranged, and at least one grating unit is uniquely corresponding to every four adjacent rows of pixels;

the human eye tracker is used for acquiring the positions of the eyes of an observer when the observer faces the display screen, wherein the positions of the eyes are the spatial positions of the eyes relative to the display screen; judging whether the binocular positions fall into an optimal observation area of the naked eye 3D visual area or not, wherein the optimal observation area comprises an ideal left visual area and an ideal right visual area which belong to a pupil distance range;

The image processor is used for adjusting the image display of the row pixels corresponding to each grating unit to adjust the space position of the optimal observation area if the left eye position does not fall into the ideal left visual area, the right eye position does not fall into the ideal right visual area, and the vertical distance between the two eye positions and the display screen is not smaller than the furthest observation distance or not larger than the nearest observation distance;

the furthest observation distance is the furthest vertical distance between the binocular position and the display screen when the observer is positioned in the optimal observation area, and the closest observation distance is the closest vertical distance between the binocular position and the display screen when the observer is positioned in the optimal observation area.

12. The naked eye 3D display device according to claim 11, wherein each grating unit comprises one grating and one slit arranged adjacently; every adjacent four rows of pixels uniquely correspond to one grating unit; if every adjacent four rows of pixels sequentially comprise a first row of pixels, a second row of pixels, a third row of pixels and a fourth row of pixels;

the image processor is further configured to: before the eye tracker acquires the positions of eyes of an observer facing a display screen, controlling the first row of pixels and the second row of pixels corresponding to each grating unit to display left eye images, and controlling the third row of pixels and the fourth row of pixels corresponding to each grating unit to display right eye images;

The eye tracker is further configured to: before the positions of eyes of an observer facing a display screen are obtained, determining the spatial position of the naked eye 3D visual area according to image display of row pixels corresponding to each grating unit, wherein the naked eye 3D visual area comprises a left visual area, a right visual area and a crosstalk area; and determining an optimal observation area of the naked eye 3D visual area according to the spatial position of the naked eye 3D visual area.

13. The naked eye 3D display device according to claim 12, wherein the image processor is further configured to:

if the left eye position and the right eye position are respectively positioned at the left half pupil distance of the ideal left visual area and the ideal right visual area, controlling the first row of pixels to display left eye images, the second row of pixels and the third row of pixels to display right eye images, and the fourth row of pixels to display left eye images so as to shift the optimal observation area leftwards by half pupil distance;

and if the left eye position and the right eye position are respectively positioned at the ideal left visual area and the ideal right visual area and are deviated by half of the pupil distance to the right, controlling the first row of pixels to display a right eye image, the second row of pixels and the third row of pixels to display a left eye image, and the fourth row of pixels to display a right eye image so as to shift the optimal observation area to the right by half of the pupil distance.

14. The naked eye 3D display device according to claim 12, wherein each adjacent four rows of pixels uniquely corresponds to one raster unit, specifically: the slits of the grating units correspond to one row of pixels, and the gratings of the grating units correspond to three adjacent rows of pixels;

when the left eye position does not fall within the ideal left view region, the right eye position does not fall within the ideal right view region, and the vertical distance between the both eye positions and the display screen is not less than the furthest viewing distance, the image processor is specifically configured to:

controlling the first row of pixels to display a left eye image and the second row of pixels to display a right eye image; or,

controlling the second row of pixels to display a left eye image and the third row of pixels to display a right eye image; or,

controlling the third row of pixels to display a left eye image, and controlling the fourth row of pixels to display a right eye image; or controlling the fourth row of pixels to display a left eye image, and controlling the first row of pixels to display a right eye image.

15. The naked eye 3D display device according to claim 12, wherein each adjacent four rows of pixels uniquely corresponds to one raster unit, specifically: the slits of the grating units correspond to one row of pixels, and the gratings of the grating units correspond to three adjacent rows of pixels;

When the left eye position does not fall within the ideal left view region, the right eye position does not fall within the ideal right view region, and the vertical distance between the two eye positions and the display screen is not greater than the nearest viewing distance, the image processor is specifically configured to:

controlling the first row of pixels to display a left eye image, and the third row of pixels to display a right eye image; or,

controlling the second row of pixels to display a left eye image, and controlling the fourth row of pixels to display a right eye image; or,

controlling the first row of pixels to display a right eye image, and controlling the third row of pixels to display a left eye image; or,

and controlling the second row of pixels to display a right eye image, and controlling the fourth row of pixels to display a left eye image.

16. A naked eye 3D display device, comprising:

the display screen comprises a plurality of rows and columns of pixels, and each column of pixels comprises three columns of sub-pixels;

the grating structure comprises a plurality of grating units which are sequentially arranged, and at least one grating unit is uniquely corresponding to each adjacent four columns of sub-pixels;

the human eye tracker is used for acquiring the positions of the eyes of an observer when the observer faces the display screen, wherein the positions of the eyes are the spatial positions of the eyes relative to the display screen; judging whether the binocular positions fall into an optimal observation area of the naked eye 3D visual area or not, wherein the optimal observation area comprises an ideal left visual area and an ideal right visual area which belong to a pupil distance range;

The image processor is used for adjusting the image display of the column sub-pixels corresponding to each grating unit to adjust the space position of the optimal observation area if the left eye position does not fall into the ideal left visual area and the right eye position does not fall into the ideal right visual area, and the vertical distance between the two eye positions and the display screen is not smaller than the furthest observation distance or not greater than the nearest observation distance;

the furthest observation distance is the furthest vertical distance between the binocular position and the display screen when the observer is positioned in the optimal observation area, and the closest observation distance is the closest vertical distance between the binocular position and the display screen when the observer is positioned in the optimal observation area.

17. The naked eye 3D display device according to claim 16, wherein each grating unit comprises one grating and one slit arranged adjacently; each adjacent four columns of sub-pixels uniquely corresponds to one grating unit; if every four adjacent rows of sub-pixels sequentially comprise a first row of sub-pixels, a second row of sub-pixels, a third row of sub-pixels and a fourth row of sub-pixels;

the image processor is further configured to: before the eye tracker acquires the positions of eyes of an observer facing a display screen, controlling the first column of sub-pixels and the second column of sub-pixels corresponding to each grating unit to display a left eye image, and controlling the third column of sub-pixels and the fourth column of sub-pixels corresponding to each grating unit to display a right eye image;

The eye tracker is further configured to: before the positions of eyes of an observer facing a display screen are obtained, determining the spatial position of the naked eye 3D visual area according to image display of column sub-pixels corresponding to each grating unit, wherein the naked eye 3D visual area comprises a left visual area, a right visual area and a crosstalk area; and determining an optimal observation area of the naked eye 3D visual area according to the space position of the naked eye 3D visual area.

18. The naked eye 3D display device according to claim 17, wherein the image processor is further configured to:

if the left eye position and the right eye position are respectively positioned at the left half pupil distance of the ideal left visual area and the ideal right visual area, controlling the first row of sub-pixels to display left eye images, the second row of sub-pixels and the third row of sub-pixels to display right eye images, and the fourth row of sub-pixels to display left eye images so as to shift the optimal observation area leftwards by half pupil distance;

and if the left eye position and the right eye position are respectively positioned at the ideal left visual area and the ideal right visual area and are deviated by half of the right pupil distance, controlling the first row of sub-pixels to display the right eye image, the second row of sub-pixels and the third row of sub-pixels to display the left eye image, and the fourth row of sub-pixels to display the right eye image so as to shift the optimal observation area to the right by half of the pupil distance.

19. The naked eye 3D display device according to claim 17, wherein each adjacent four columns of sub-pixels uniquely corresponds to one raster unit, specifically: the slits of the grating units correspond to one column of sub-pixels, and the gratings of the grating units correspond to three adjacent columns of sub-pixels;

when the left eye position does not fall within the ideal left view region, the right eye position does not fall within the ideal right view region, and the vertical distance between the both eye positions and the display screen is not less than the furthest viewing distance, the image processor is specifically configured to:

controlling the first column of subpixels to display a left eye image, and controlling the second column of subpixels to display a right eye image; or,

controlling the second column of subpixels to display a left eye image, and controlling the third column of subpixels to display a right eye image; or,

controlling the third column of subpixels to display a left eye image, and controlling the fourth column of subpixels to display a right eye image; or,

and controlling the fourth column of subpixels to display a left eye image, and controlling the first column of subpixels to display a right eye image.

20. The naked eye 3D display device according to claim 17, wherein each adjacent four rows of pixels uniquely corresponds to a raster unit, specifically: the slits of the grating units correspond to one column of sub-pixels, and the gratings of the grating units correspond to three adjacent columns of sub-pixels;

When the left eye position does not fall within the ideal left view region, the right eye position does not fall within the ideal right view region, and the vertical distance between the two eye positions and the display screen is not greater than the nearest viewing distance, the image processor is specifically configured to:

controlling the first column of subpixels to display a left eye image, and the third column of subpixels to display a right eye image; or,

controlling the second column of sub-pixels to display a left eye image, and controlling the fourth column of sub-pixels to display a right eye image;

or,

controlling the first column of subpixels to display a right-eye image, and controlling the third column of subpixels to display a left-eye image;

or,

and controlling the second column of subpixels to display a right-eye image, and controlling the fourth column of subpixels to display a left-eye image.